Fosmon Anti-Theft Bike Alarm: Secure Your Ride with 113dB Siren


The Fosmon Anti-Theft Bike Alarm is a robust security solution designed to protect bicycles, e-bikes, motorcycles, scooters, and more. Featuring a loud 113dB siren triggered by vibration, this alarm deters thieves effectively. It's waterproof, battery-operated, and comes with a remote for easy activation and deactivation. With 7 sensitivity levels and 3 volume settings, customize it to suit your needs. The SOS function detects accidents, alerting passersby. Installation is straightforward, with adhesive or cable ties. Pair up to 8 remotes for convenience. This versatile alarm also secures luggage, trailers, and fences, offering peace of mind with a limited lifetime warranty.

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The bike theft alarm 


Fosmon is a bicycle alarm concealed on the frame or under the seat. It detects vibrations and movements and, when detected, it emits a 113 dB audible alarm. It is a robust device that requires 3 AAA batteries for several months of use.



The Fosmon connects directly to your two wheels and serves as an anti-theft device with an audible alarm with 3 volume levels and a maximum level of 113 dB ideal for scaring away thieves and alerting passers-by in the vicinity. It is also equipped with a vibration or displacement sensor with 7 levels of adjustable sensitivity that allows it to automatically emit a beep if your means of transport is tilted more than 45°. The device has a remote control that allows you to activate or deactivate the alarm function remotely, it also allows you to directly alert your friends in case of an accident thanks to the SOS function.

Adjustable levels


It is an easy device to install, you just need to clean and dry the desired mounting surface. Then apply the adhesive on the back of the alarm and place it on the dry surface. For a firmer attachment you can use fasteners that slide through the brackets on the back of the device. It has a wide range of uses, including luggage alarm, fence alarm, trailer alarm, and more. It supports up to 8 remotes with a maximum range of 20 meters.

Easy to install


It's a small device that blends discreetly into your two-wheeler and is made of sturdy drop-proof and water-resistant materials with an IP55 rating. The remote control is small and slips easily into your pocket, it has a hole to slip a strap to use it as a keychain. The remote control is powered by a 12V battery while the device requires 3 AAA batteries. It comes with a range of accessories including 2 cable ties, 2 double-sided adhesive tapes, 1 triangular plate, 1 screwdriver, and a quick start guide.

: B07PQ92SHC
: 500 Items
Hurry! only 500 items left in stock.

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Rated 4.33 on the scale 1 - 5 based on 3 customer reviews

More secure than a simple lock

I can assure you that the alarm is loud! Even at 30m I can still hear it. It took me less than 5 minutes to install. I would recommend it to anyone who wants more security than a normal lock.

My bike is much more secure since I have it

It is very easy to use. You just have to hold down the unlock button for at least 10 seconds. The blue light should turn on, then off and finally on again during this time. So goes the installation. You just have to place the alarm where you want with the included tools. Personally I prefer to put it on the seatpost.

The alarm is very loud

I don't really have a place to put my bike when I'm at work. So I bought this product. It works really well. I tested it myself. The alarm is so loud! It will definitely keep the thieves away!

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