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🚨 Secure your ride, silence your worries!
The Fosmon 113dB Bike Alarm is a compact, IP65 waterproof anti-theft system designed for bicycles, e-bikes, scooters, motorcycles, and trailers. Featuring a powerful 113dB siren, adjustable vibration sensitivity, and a remote control with a 90-foot range, it offers customizable, multi-level protection. Its SOS tilt detection adds an emergency alert function, while easy installation and durable build make it a must-have security upgrade for urban commuters and outdoor enthusiasts alike.







| ASIN | B07PQ92SHC |
| Audible Noise | 113 db |
| Best Sellers Rank | #34,505 in Automotive ( See Top 100 in Automotive ) #10 in Antitheft Alarm Systems |
| Brand | Fosmon |
| Compatible Devices | bicycles, e-bikes, scooters, motorcycles, carts, trailers |
| Customer Reviews | 4.5 out of 5 stars 6,624 Reviews |
| Global Trade Identification Number | 00879565005795 |
| Item Weight | 4 ounces |
| Manufacturer | Fosmon |
| Maximum Range | 90 feet |
| Mfr Part Number | 51087HOM |
| Model Number | 51087HOM |
| Noise Level | 113 db |
| Number of Items | 1 |
| UPC | 879565005795 |
| Unit Count | 1 Count |
R**Y
It’s loud
Only had it for two days. When tested it on my Fold 1 Plus it worked great. Mounted easily and was loud. Hope it will never have to be used. But I’m confident that it will work if needed. Good price and recommended.
P**E
A Must-Have Security Upgrade for My Electric Scooter
I recently added this remote-controlled alarm to my electric scooter, and I couldn’t be happier with the results. As someone who relies on my scooter for daily transportation, I’m always concerned about theft, especially when locking it up at a bike rack in public. This alarm has given me so much peace of mind. Durable and Well-Built The alarm feels solid and well-made. It’s compact enough to stay out of sight, but the quality of the build gives me confidence that it can withstand daily use and varying weather conditions. Powerful Alarm The sound is LOUD—exactly what you want in an alarm. If someone so much as nudges the scooter, it triggers a piercing alert that would scare off any would-be thief and draw immediate attention. Easy Installation The installation process was straightforward. It comes with everything you need to attach it securely, and the instructions were clear. I had it set up in less than 10 minutes. Convenient Remote Control The remote control is a game changer. It’s small enough to carry on my keychain and has a good range, so I can activate or deactivate the alarm without having to be right next to the scooter. The remote also feels sturdy and well-designed. Added Security Layer While I always lock up my scooter with a quality U-lock, this alarm adds a crucial extra layer of security. Knowing that any tampering will trigger a loud alarm makes me feel much more comfortable leaving my scooter unattended for extended periods. It’s a deterrent that could make a potential thief think twice. Battery Life The battery life has been excellent so far. I’ve been using it for a few weeks, I appreciate that it doesn’t drain quickly despite being in constant use. Overall This remote-controlled alarm has become an essential part of my scooter setup. It’s affordable, easy to use, and provides an extra layer of protection that every electric scooter owner should have. If you’re looking for a reliable, effective way to deter theft, this is it. Highly recommend!
R**N
Great touring bike alarm!
Effective, easy to use alarm for my touring bike. Really loud! Just have to remember to disarm it when you return!!! Used it during a solo coast-to-coast cycling tour across the U.S.
A**M
Great alarm with small flaw
The the remote is gives a unique look, battery life is still testing wit what th company offers. The durability is solid I mean beside it being plastic I don’t think anyone is going to destroy it right then there. Alarm is at least loud for some attention. Weight is light. Bad part is one small flaw the very small screw it so easy to lose. I was literally unscrewing to get the safety plastic off to use it and placed the screw on my lap a now I can’t find it. If the device had like little safety hooks to have the lid secure like when your dissembling a console that type of safety.
E**T
Worth every dime
Works great and such an inexpensive item for more piece of mind. Easy to install and operate.
A**N
Great alarm!!!!
Great alarm very loud !!!! Works as advertised!!!!!
S**K
Loud for it's size
Good sound for its size and gives me reassurance that it works when needed after locking up a bike over night
V**G
It Need work
When I received it it didn't work I don't know if it was the battery what was dead or just a speaker wasn't connected correctly but after I took it apart and screwed with the internals a little bit I got to work a little bit better update from the first rating I did for this product
J**A
Satisfecho con el producto
Excelente producto
F**W
Rower jest zabezpieczony - pozornie😉
Fajny gadżet moim zdaniem bardzo dobrze wykonany, kupiłem coś podobnego na aliexpress i nie było to w jakość jak jest tutaj. Generalnie fajnie się sprawdza chociaż wiadomo, że nie jest zabezpieczeniem doskonałym ale odstrasza potencjalnego złodzieja i chyba dlatego został zrobiony. Sygnał głośny. Czujnik ruchu wrażliwy. Zapewne przyda się jako odstraszacz amatorów nieswoich rowerów
J**D
Litet alarm
Liten smidigt alarm
A**L
Alarmanlage e bike oder anderes
Super alarmanlage fürs rad oder anderes geht laut und reagiert super.einfache bedienung und anleitung.manko das sie batteriebetriben wird.aber passt trotzdem.
C**N
Funciona muy bien
Perfecto tal y como se describe Funcionamiento Perfecto
Trustpilot
3 days ago
1 month ago