Choosing among the best e-bike anti-tampering kits means deciding what you want the alarm to do when someone touches or moves your bike: sound a powerful warning, give you convenient remote control, or add useful extras such as rechargeable power and a locate function. These five kits are vibration-triggered alarms, not locks or GPS trackers, so I judge them as one layer of a broader theft-prevention setup.
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My leading picks serve different needs. The WSDCAM 113dB two-pack stands out for broad remote range and adjustable settings across two alarms; the Max 110dB rechargeable alarm pairs a stated 100-meter remote range with a rechargeable battery and vehicle locator; and the rechargeable WSDCAM B0CYT3W27W adds fall detection and a stated long standby period. The tradeoffs are just as useful: more sensitivity can mean more nuisance alarms, adhesive mounting can be less reassuring than a fixed mount, and battery upkeep varies by model.
I rank these options by how well their stated features fit everyday e-bike security, how much control they offer, and what a buyer gives up. None can stop a bike from being carried away, and none replaces a quality lock. The right choice is the one whose alert style, power needs, and mounting method fit where you park and how you use your bike.
Key Takeaways
- Best all-around two-alarm setup: WSDCAM 113dB 2 Pack pairs two alarms with a stated 328-foot remote range, IP65 protection, and seven sensitivity settings.
- Best stated remote reach in this group: Max 110dB lists a 100-meter range, plus rechargeable power and a vehicle locator; its alarm duration is limited to 30 seconds.
- Best rechargeable feature mix: WSDCAM B0CYT3W27W adds fall detection and reports up to 6–11 months of standby, though fit and sensitivity still need attention.
- Best straightforward two-pack alternative: USUPERINK supplies two 113dB alarms with IP65 protection, but its 66-foot remote range is shorter than WSDCAM 2 Pack’s stated range.
- Best simple locate feature: Wsdcam B0734QN8KR offers vehicle search and adjustable volume and sensitivity, but its listed 66-foot range is less suited to long-distance remote use.
| e-bike anti-tampering kit | Alarm volume | Sensitivity | Weather protection | Pack count |
|---|---|---|---|---|
| WSDCAM 113dB Loud Anti Theft V | 113dB | 7 levels | IP65 | 2 alarms |
| Max 110dB Bike Alarm with Remo | — | 7 levels | — | — |
| WSDCAM Wireless Bike Alarm wit | 113dB | 7 levels | IP65 | — |
| USUPERINK Wireless Bike Alarm | 113dB | — | IP65 | 2 alarms |
| Wsdcam 113dB Bike Alarm Wirele | 113dB | 7 levels | Waterproof design; specific rating not supplied | 1 alarm |
More Details on Our Top Picks
WSDCAM 113dB Loud Anti Theft Vibration Sensor Alarm System (2 Pack)
This is my best overall pick because it combines two alarms with the broadest stated remote range in this lineup: 328 feet. That combination suits a rider who wants to protect more than one bike or place a second alarm on another vulnerable item, while keeping remote control practical across a larger parking area. The 113dB alert, IP65 rating, and seven sensitivity levels give it the key ingredients expected from a vibration-triggered deterrent.
Its advantage over the USUPERINK two-pack is the longer stated remote reach; both offer two units, 113dB alarms, and IP65 protection. Compared with the single rechargeable WSDCAM B0CYT3W27W, this set puts more emphasis on multiple alarms and range than on a stated rechargeable battery, standby estimate, or fall detection. Buyers should check the actual battery arrangements and upkeep before installation because the supplied specifications do not spell out battery life.
The sensitivity and volume controls are useful in different environments: a quieter setting may be more suitable near neighbors, while a more sensitive setting can react to smaller movement. The tradeoff is that setup may take some trial and error, and an alarm this loud can be disruptive if a passing bump triggers it. The remote, adhesive pads, and cable ties give mounting flexibility, but the description does not establish a tamper-proof mount. I would treat it as a strong alarm layer, not as a substitute for a lock.
Pros:- Includes two alarms and a remote with a stated 328-foot wireless range.
- 113dB sound and seven sensitivity settings allow a customizable warning.
- IP65 protection is suited to outdoor exposure when installed as directed.
- Includes cable ties and adhesive pads for flexible placement.
Cons:- Battery life and replacement details are not included in the supplied specifications.
- Placement and sensitivity may take adjustment to reduce nuisance alarms.
- A loud alert can disturb people nearby if ordinary movement triggers it.
Best for: Riders who want two alarms, broad stated remote reach, and adjustable settings for more than one bike or security point.
Not ideal for: Buyers who want a clearly specified rechargeable battery, a discreet alarm, or a mount that uses a dedicated screw attachment.
- Brand:WSDCAM
- Pack count:2 alarms
- Model:WSD22R01C
- Alarm volume:113dB
- Wireless range:328 feet
- Sensitivity:7 levels
- Weather protection:IP65
- Included mounting items:Cable ties and double-sided adhesive tape
- Warranty:1 year
Our verdict“I would choose this two-pack for its mix of two alarms, adjustable detection, and longest stated remote range, provided battery details meet your needs.”
Max 110dB Bike Alarm with Remote and Adjustable Sensitivity for E-bikes and Motorcycles
The Max is the clearest match for riders who prioritize rechargeable power and a long stated remote range. Its specifications list a 100-meter remote range, a 700mAh rechargeable lithium battery, and a vehicle-locator function. That gives it a different appeal from the WSDCAM two-packs, where the supplied details emphasize multiple alarms but do not specify rechargeable power. A locate function can help identify a parked bike, while sensitivity adjustment lets a rider tune how readily the alarm reacts to movement.
It is rated at 110dB, slightly below the 113dB models here, but loudness alone does not decide which kit is more useful. The Max’s 100-meter range is notably longer than the 66-foot ranges listed for USUPERINK and the B0734QN8KR Wsdcam model. The WSDCAM B0CYT3W27W is also rechargeable and adds fall detection, so that model may suit riders who value those specific features more than the Max’s stated range. Remote performance will still depend on obstructions and where the alarm is mounted.
The main drawback is operational: the alarm is described as sounding for 30 seconds, and the battery needs charging every one to three months according to the supplied description. That recurring upkeep is more explicit than for products whose battery details are not given, but it is still something to plan around. A lost or damaged remote also weakens convenience. I would pick this over a basic 66-foot alarm when the remote reach and rechargeable setup matter most, but not for a rider who wants the longest stated standby period.
Pros:- Lists a 100-meter remote range, longer than the other stated ranges here.
- Rechargeable 700mAh lithium battery avoids relying on unspecified replaceable-battery details.
- Vehicle locator and multiple alert sounds add useful parking-lot convenience.
- Seven sensitivity levels allow adjustment for different parking conditions.
Cons:- Alarm duration is limited to 30 seconds according to the supplied details.
- Requires charging every one to three months, depending on use.
- The remote can be lost or damaged, reducing the value of remote operation.
Best for: E-bike owners who want rechargeable power, a vehicle-locator function, and the longest stated remote reach in this comparison.
Not ideal for: Riders who prefer minimal charging upkeep, want a two-alarm package, or need an alarm that sounds for longer than the stated 30-second interval.
- Sound level:110dB
- Remote range:100 meters
- Battery:4.2V 700mAh rechargeable lithium battery
- Sensitivity:7 levels
- Weather resistance:IP65
- Alarm duration:30 seconds
- Charging interval:Every 1–3 months, as described
- Warranty:1 year
Our verdict“I would choose the Max for rechargeable operation and its stated 100-meter remote reach, while accepting regular charging and a 30-second alarm cycle.”
WSDCAM Wireless Bike Alarm with Remote, Rechargeable 113dB Loud Bicycle Alarm System Anti-Theft, IP65 Waterproof for E-Bikes, Motorcycles, Scooters
This rechargeable WSDCAM is the most feature-specific choice for riders who want more than a basic vibration siren. It combines a 113dB alarm, seven sensitivity levels, fall detection, and rechargeable power. The product description also reports up to six to eleven months of standby, which could mean less charging attention than the Max’s stated one-to-three-month charging interval. Those figures are supplied claims rather than a guarantee of actual runtime, which can vary with use and conditions.
Compared with the Max 110dB, this model gives up some stated remote reach: its remote is listed at 20 meters, while the Max lists 100 meters. In exchange, it adds fall detection and a longer claimed standby window. Against the WSDCAM two-pack, it is a one-alarm rechargeable option rather than a pair of alarms with a stated 328-foot range. It makes the most sense when a rider values a rechargeable unit and the extra fall-detection feature over covering two bikes or controlling the alarm from farther away.
Mounting uses a double-sided sticker and strap, with no screws required. That can simplify installation and avoids drilling or hardware changes, but it may be less reassuring to buyers who want a more fixed attachment. The product description notes that sensitivity may need adjustment for different bike types, and wireless range can fall in obstructed locations. The battery capacity is listed as “700AH,” an unusual unit for this type of specification, so I would verify battery details with the seller rather than interpret that figure as a confirmed capacity.
Pros:- Combines a 113dB alarm with seven sensitivity levels and fall detection.
- Rechargeable design with Type-C charging is described as offering up to 6–11 months of standby.
- IP65 protection is intended for outdoor use.
- Adhesive-and-strap mounting avoids a screw-installation requirement.
Cons:- Its 20-meter stated remote range is shorter than the Max’s 100-meter specification.
- Sticker-and-strap mounting may not satisfy buyers seeking a more fixed installation.
- The listed battery capacity uses an unclear “700AH” unit and should be verified.
Best for: Riders who prefer a rechargeable alarm with fall detection and a claimed long standby period, and who can work within a 20-meter stated remote range.
Not ideal for: Buyers who need the longest remote distance, two alarms in one set, screw-based mounting, or fully clear battery-capacity documentation.
- Alarm volume:113dB
- Remote range:20 meters / 66 feet, as listed
- Sensitivity:7 levels
- Battery:Rechargeable; listed capacity is 700AH
- Reported standby:Up to 6–11 months, as described
- Weather protection:IP65
- Fall detection:Yes
- Installation:Double-sided sticker and strap; no screws required
- Charging port:Type-C, as described
Our verdict“I would choose this model for rechargeable convenience and fall detection, but not when long-distance remote control or clear battery specifications come first.”
USUPERINK Wireless Bike Alarm for Ebikes – 2 Pack with Remote
USUPERINK is a practical choice for someone who wants two 113dB alarms without prioritizing extended remote distance or rechargeable extras. It shares the core format of the WSDCAM two-pack: two wireless vibration alarms, remote operation, IP65 protection, and adjustable sensitivity and volume. This makes it useful for securing two bikes or keeping a spare alarm for another vehicle, rather than buying a feature-heavy single unit.
The main distinction is range. USUPERINK lists a 66-foot remote range, while the WSDCAM 2 Pack lists 328 feet. That difference makes WSDCAM the stronger fit for a larger parking area or a rider who expects to trigger the alarm from farther away. USUPERINK still gives a substantial stated range for many nearby parking situations, and its alarm and weather rating match the headline figures of the WSDCAM two-pack. Unlike the Max and rechargeable WSDCAM single alarm, no rechargeable battery details or charging interval are supplied.
Installation relies on stickers or straps rather than a described screw mount. That helps keep setup simple and avoids altering the bike, but attachment security may be a concern if the unit is easy to reach. The alarm responds to vibration, so a rack bump, bike handling, or an overly sensitive setting may trigger it even when there is no theft attempt. I would use the sensitivity control to tune it after mounting and choose this set over the 66-foot Wsdcam single alarm when two alarm units matter more than vehicle-search tones or a more clearly detailed feature set.
Pros:- Two alarms provide coverage for two bikes or a spare unit.
- 113dB sound with adjustable volume and sensitivity.
- IP65 rating is suited to outdoor use when installed as directed.
- Remote range is listed at 66 feet.
Cons:- The stated 66-foot range is shorter than the WSDCAM 2 Pack and Max specifications.
- Sticker or strap installation may feel less secure than a fixed hardware mount.
- Battery life and replacement details are not stated in the supplied specifications.
Best for: Riders who want two loud, weather-resistant alarms for two bikes or two security points and can use a 66-foot remote range.
Not ideal for: Buyers who need longer remote reach, a documented rechargeable battery, or a mounting system that is explicitly screw-secured.
- Brand:USUPERINK
- Model:KS-SF22R
- Pack count:2 alarms
- Alarm volume:113dB
- Maximum remote range:66 feet
- Weather protection:IP65
- Controls:Adjustable sensitivity and volume
- Installation:Stickers or straps
Our verdict“I would choose USUPERINK when a simple two-alarm set matters more than long remote range, rechargeable power, or extra locator features.”
Wsdcam 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with Remote
This Wsdcam model keeps the proposition simple: a 113dB vibration alarm, adjustable sensitivity and volume, weather-resistant construction, and a remote with a vehicle-search function. It is the most straightforward choice here for a rider who wants to hear a locating tone when a bike is parked among others, without needing fall detection or a stated rechargeable battery. Three volume levels make it easier to set a less intrusive alert when a maximum-volume warning would be unwelcome.
Compared with the USUPERINK two-pack, it is a single alarm but adds a vehicle-search function and three volume levels in the supplied specifications. USUPERINK has the stronger case for covering two bikes, while this Wsdcam model is better matched to a single bike and quick locating in a busy rack. The WSDCAM 2 Pack lists a far longer 328-foot remote range; this model lists 66 feet, placing it closer to USUPERINK and making remote use more dependent on staying nearby.
Its seven sensitivity levels give riders room to tune the detector, but high sensitivity can lead to false alerts from ordinary vibration or bike handling. That is a shared limitation across this lineup, not a flaw unique to this model. The product details do not specify battery type, capacity, or expected life, so I would not choose it over the rechargeable Max or WSDCAM B0CYT3W27W if maintenance planning is a priority. The vehicle-search feature and adjustable sound are its clearest reasons to choose it, not a claim of greater theft protection than the other alarms.
Pros:- 113dB alarm with three volume settings for different surroundings.
- Seven sensitivity levels allow the vibration trigger to be tuned.
- Vehicle-search function helps identify the bike in a crowded area.
- Waterproof design is intended for outdoor conditions.
Cons:- The 66-foot remote range is shorter than the stated ranges of the WSDCAM 2 Pack and Max.
- Sensitivity set too high may produce false alarms from ordinary movement.
- Battery type, life, and replacement details are not supplied.
Best for: A rider with one bike who wants an adjustable alarm and a remote tone to help locate it in a crowded parking area.
Not ideal for: Buyers who need two alarms, a long stated remote range, fall detection, or clear rechargeable-battery specifications.
- Alarm volume:113dB
- Wireless range:66 feet
- Sensitivity:7 levels
- Volume settings:3 levels
- Detection:Vibration and motion sensor
- Remote feature:Vehicle search
- Weather protection:Waterproof design; specific rating not supplied
- Pack count:1 alarm
Our verdict“I would pick this single alarm for its vehicle-search tone and adjustable volume, but choose another model for two-bike coverage or rechargeable power.”

How We Picked
I compared these products as anti-tampering alarms for e-bikes, not as complete security systems. Each listed option relies on vibration detection, so I focused on how clearly the supplied details describe alert loudness, sensitivity control, remote operation, weather protection, power, and mounting. Those are the features that shape whether an alarm is practical for a bike parked at home, outside a shop, or in a shared rack.
My order reflects the balance of useful security features and disclosed tradeoffs. I give weight to adjustable sensitivity because a bike can be jostled during ordinary parking, but sensitivity settings cannot guarantee that false alarms will never happen. I also compare stated remote ranges as supplied rather than treating them as guaranteed real-world distances: walls, other obstructions, and placement can affect wireless operation. IP65 claims count as a weather-protection advantage, not proof that a unit can be submerged.
Power and installation matter because an alarm that is inconvenient to maintain or insecurely attached may be less useful in daily life. Where a product description specifies a rechargeable battery, charging interval, or adhesive-and-strap mount, I include that information and its limitations. Where battery details are absent, I do not fill the gap with assumptions. I also treat alarm decibels as a deterrent feature, not a promise that the sound will prevent theft or be equally audible in every setting.
The lineup has no lock, GPS location service, or dedicated motor immobilizer among the supplied product details. I do not award points for protections these products are not described as providing. My recommendations distinguish between buyers who want two alarms, longer stated remote reach, rechargeable convenience, fall detection, or a basic vehicle-search tone. For all five, I would pair the alarm with a secure physical lock and sensible parking habits.
| e-bike anti-tampering kit | Weather protection |
|---|---|
| WSDCAM 113dB Loud Anti Theft V | IP65 |
| Max 110dB Bike Alarm with Remo | — |
| WSDCAM Wireless Bike Alarm wit | IP65 |
| USUPERINK Wireless Bike Alarm | IP65 |
| Wsdcam 113dB Bike Alarm Wirele | Waterproof design; specific rating not supplied |
Factors to Consider When Choosing Best E-bike Anti-tampering Kits
I would choose an alarm by matching its features to where the e-bike is parked and how the rider will respond to an alert. A siren can make tampering more noticeable, but it does not secure the frame to a fixed object or report the bike’s location after it leaves. The comparisons below help separate alarm coverage, remote convenience, and maintenance from claims these products do not make.
Treat a vibration alarm as one layer, not the whole kit
All five picks are primarily vibration-triggered alarms. Their job is to react to movement and sound a warning; the supplied descriptions do not establish that they immobilize the motor, track the bike by GPS, or prevent someone from lifting it. A loud alert may draw attention, but it cannot physically hold a bicycle in place. I would pair any of these alarms with a properly sized lock that secures the frame to an immovable object, and use a second locking point when the bike and parking situation warrant it.
Think about what you need the alarm to add. If your main worry is unnoticed handling at a shared rack, adjustable sensitivity and a clear warning are relevant. If you need to recover a bike after it is taken, a vibration siren alone does not provide location tracking. The Max’s vehicle locator and the Wsdcam B0734QN8KR’s vehicle-search function are for finding a nearby parked bike by sound; they are not remote tracking services.
Compare remote range carefully
The largest stated range belongs to the WSDCAM 2 Pack at 328 feet, followed by the Max at 100 meters. USUPERINK and both single WSDCAM/Wsdcam alternatives list approximately 66 feet or 20 meters. Those figures can help compare the manufacturers’ claims, but they should not be treated as guaranteed working distances. Walls, metal structures, interference, and how the remote and alarm are positioned can affect the signal.
For a bike parked beside a café patio or near a home entry, a shorter range may be enough. A rider who expects to use a remote from across a larger lot may prefer a model with a longer stated reach, while still checking the signal in the actual setting. I would not pay attention to range alone: the Max gives the longest stated reach among the single rechargeable options, but the WSDCAM 2 Pack claims more reach and includes two alarms.
Tune sensitivity to the parking environment
Every model in this roundup depends on movement sensing, which means ordinary contact can resemble tampering. A busy rack, a bike parked beside a pedestrian path, or routine handling can produce unwanted alerts. Seven sensitivity levels are available on the WSDCAM 2 Pack, Max, rechargeable WSDCAM, and Wsdcam single alarm; USUPERINK also offers adjustable sensitivity, though the supplied specification does not state a level count.
I would begin with a moderate setting and adjust after the alarm is mounted in its final position. A setting that is too low may miss light movement; a setting that is too high can sound unnecessarily. Do not judge sensitivity while holding the alarm in your hand, because the bike’s frame, mounting spot, and parking surface all affect how vibration reaches the sensor. A useful alarm is one you can leave armed without creating repeated disruption.
Balance loudness against where you park
The listed alarms range from 110dB to 113dB. The Max is rated at 110dB, while the other models list 113dB. That difference may matter to a buyer comparing stated specifications, but loudness alone does not prove that one alarm will prevent theft. Sound can be affected by the installation location, nearby buildings, background noise, and the way a bike is parked.
Volume control is useful if the bike is stored near neighbors or in a shared indoor area. The Wsdcam B0734QN8KR gives three volume levels, and the other supplied descriptions also note volume adjustment. Before arming a high-volume alarm in a quiet building or close to other parked bikes, test the settings responsibly. A warning that draws attention is useful; one that repeatedly sounds during normal activity may lead people nearby to ignore it.
Choose a power setup you will maintain
The Max and rechargeable WSDCAM B0CYT3W27W are the clearest choices for buyers who want a rechargeable unit. The Max description calls for charging every one to three months, while the WSDCAM description reports up to six to eleven months of standby. These are stated estimates, not fixed schedules for every rider. Frequent triggering, usage patterns, and conditions can change how often charging is needed.
The other listings do not provide enough battery detail to compare expected runtime or replacement needs. I would not assume that an unspecified battery lasts longer than a rechargeable one. Check the product instructions for charging, replacement, and low-battery indications, then include that maintenance in your routine. An alarm that is left unpowered cannot alert you, regardless of its listed volume or sensitivity range.
Check weather protection and mounting before installation
Four products list an IP65 rating; the single Wsdcam B0734QN8KR description says waterproof but does not supply a specific rating. IP65 is a useful stated protection level for outdoor use, but buyers should follow the product instructions and avoid treating an alarm as suitable for immersion. Position it where water exposure and dirt are less likely to interfere with the unit, and inspect its attachment after riding or cleaning.
Mounting approaches differ. The WSDCAM 2 Pack includes cable ties and adhesive tape, USUPERINK relies on stickers or straps, and the rechargeable WSDCAM specifies a sticker and strap with no screws required. Easier installation can be helpful when you do not want to drill or alter the bike, but adhesive or strap mounting may feel less fixed than a dedicated hardware attachment. Clean and dry the mounting surface, follow the manufacturer’s instructions, and check that the alarm is not easy to knock off or obstruct.
Decide whether you need one alarm or two
The WSDCAM 2 Pack and USUPERINK set both include two alarms, which can be useful for two bikes, a bike and another vehicle, or keeping a spare unit available. The remaining three products are presented as single alarms. A pair can expand coverage, but it does not automatically improve protection for one bike unless both alarms are placed where they can detect movement and remain securely attached.
If you own one e-bike, compare the benefits of an extra alarm with the features a single unit adds. The Max’s rechargeable battery and vehicle locator, or the rechargeable WSDCAM’s fall detection, may be more relevant than a second siren. The Wsdcam B0734QN8KR offers a simple vehicle-search tone. I would select based on the actual parking routine, rather than treating a higher unit count as better security by itself.
Frequently Asked Questions
Can an e-bike alarm prevent someone from stealing the bike?
An alarm can warn nearby people when vibration or movement crosses its trigger threshold, but it is not a physical lock and cannot guarantee that a thief will leave the bike alone. None of the supplied descriptions identifies these models as GPS trackers or motor immobilizers. I would use an alarm to add a visible or audible deterrent and pair it with a secure lock that anchors the frame to a fixed object.
Which kit has the longest stated remote range?
The WSDCAM 113dB two-pack lists a 328-foot wireless range, the longest stated distance among these products. The Max lists 100 meters, while USUPERINK and the two single-alarm alternatives list about 66 feet or 20 meters. These are manufacturer-provided figures, and actual operation can vary with walls, metal structures, interference, and device placement.
Are vibration alarms likely to trigger accidentally?
They can trigger when ordinary movement resembles tampering, such as a nearby bike being handled or a rack being bumped. Each product here relies on vibration detection, so sensitivity adjustment is one way to find a setting that fits the parking spot. I would mount the alarm securely, start at a moderate sensitivity level, and adjust it after observing how the bike behaves in its usual location.
Which of these alarms is rechargeable?
The Max 110dB model and WSDCAM B0CYT3W27W are described as rechargeable. The Max lists a 700mAh rechargeable lithium battery and a charging interval of one to three months; the WSDCAM description reports up to six to eleven months of standby but gives an unusual “700AH” capacity figure that should be verified. The supplied details for the other three products do not specify battery life or replacement arrangements.
Can I leave these alarms outdoors on my e-bike?
Several models list an IP65 rating, and the remaining Wsdcam description calls the unit waterproof without stating a rating. That supports outdoor-use claims, but it is not a reason to submerge an alarm or ignore its installation instructions. I would mount the unit securely in a suitable position, follow the manufacturer’s guidance for exposure and care, and check the alarm periodically for damage or loosening.
Conclusion
For the broadest mix of two alarms and stated remote reach, I would start with the WSDCAM 113dB 2 Pack. Choose USUPERINK if you also want two units but do not need the WSDCAM’s longer stated range. Riders who prefer a rechargeable single alarm and a vehicle locator should look at the Max, while the rechargeable WSDCAM B0CYT3W27W is the better fit when fall detection and its reported standby period matter more than range. For one-bike owners who mainly want adjustable sound and a nearby vehicle-search tone, the Wsdcam B0734QN8KR keeps things simple.
Whichever kit fits, I would treat it as an extra warning layer, not the main theft barrier. Match the sensitivity to the parking environment, verify the mounting and power routine, and use a quality lock to secure the e-bike. That combination gives the alarm a clear supporting role without expecting a siren to do the work of a lock or a tracker.
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