

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.
🚨 Stay a step ahead—secure your ride with Fosmon’s fierce 113dB alarm!
The Fosmon 113dB Bike Alarm is a compact, IP65 waterproof anti-theft system featuring a powerful 113-decibel siren, adjustable vibration sensitivity, and a wireless remote with a 90-foot range. Designed for bicycles, e-bikes, scooters, motorcycles, and trailers, it includes an SOS tilt alert for accident detection and supports up to 8 remotes. Easy to install and built to withstand harsh weather, it offers a robust security upgrade backed by a limited lifetime warranty.







| ASIN | B07PQ92SHC |
| Audible Noise | 113 db |
| Best Sellers Rank | #27,087 in Automotive ( See Top 100 in Automotive ) #8 in Antitheft Alarm Systems |
| Brand | Fosmon |
| Compatible Devices | bicycles, e-bikes, scooters, motorcycles, carts, trailers |
| Customer Reviews | 4.5 out of 5 stars 6,606 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!!!!!
G**O
Not as loud as I thought
Not as loud as I thought
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
S**R
Klasse Alarmanlage
Sehr gut sehr laut sehr empfindlich was gut ist. Benutze es überall wo geklaut werden könnte. Sowie im Rucksack am Meer, oder im Haus wenn Putzfrau kommt, am Motorrad und Fahrrad. Oder auch vor Fenster und Türen.
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**E
Great product for the price. Good instructions for customisation and works as its supposed to.
Great value little alarm that is easily customisable for purpose. 7 sensitivity settings 3 choice of tones Volume is customisable When armed, gives two brief different tonal warnings intervals apart before it wreaks havoc (continuous). Also has finder button to locate item. For $23-28, despite the crisp plasticky look and feel of the remote, this little wonder has become a necessity as an effective deterrent to bike theft as bike locks are all eventually overcome with the right tools. So nobody's complaining. Thankyou! Trick is to find a spot to hide/ secure it so that it is hard to remove too easily.
Trustpilot
3 weeks ago
2 weeks ago