Fosmon Wireless Bike Alarm Anti-Theft with Remote, Waterproof, Battery Operated, Super Loud 113dB Security Alarm for Bicycle, Motorbike, Mobility Scooter, E-Bike
£17.99
Price: £17.99
(as of Jun 13, 2025 21:27:02 UTC – Details)
Product Description
Loud 113dB Bicycle Alarm 
Protect and deter theft with Fosmon’s 113dB Bicycle Alarm. This alarm works great to provide additional security for bicycles, motorcycles, e-bikes, scooters, carts, trailers, and other expensive equipment.
Vibration and SOS Sensor Alarm 
This bike alarm responds to vibration and being moved. When nudged, a small beep will sound, and when it is moved the alarm will trigger for 30 seconds or until stopped. With SOS enabled, the alarm will automatically make a beeping sound when your vehicle falls over due to accidents.
7 Levels of Adjustable Sensitivity 
Control the sensitivity of your vibration sensor alarm with 7 levels of adjustment. The alarm sound can also be set to 3 different volume levels. This allows you to set up your bike alarm however you want it.
Setup is Easy 
Package Includes: 1x Alarm (batteries included), 1x Remote (battery included), 2x Cable Tie, 2x Double Sided Tape, 1x Opening Pick, 1x Screwdriver, 1x Quick Start Guide
Batteries : 3 AAA batteries required.
Product Dimensions : 9.5 x 4.19 x 2.29 cm; 113.4 g
Date First Available : 13 May 2019
Manufacturer : Fosmon
ASIN : B07PQ92SHC
Item model number : 51087HOM
Country of origin : China
Guaranteed software updates until : unknown
[Loud 113dB Bike Alarm] Fosmon’s 113dB loud vibration bicycle alarm with remote control is a great tool to protect your bike from theft. Keep your bicycle, e-bike, scooter, motorcycle, and more secured with this alarm.
[Vibration Sensor And SOS Alarm] When armed, this anti-theft bicycle alarm responds to vibration or being moved. You can manually adjust the 7 different sensitivity levels and 3 volume levels to best fit your setup. SOS function will detect an accident if the vehicle is tilted more than 45° from its original position, and then make a beeping sound to signal for help.
[Easy To Set Up] This anti-theft vibration alarm is easy to set up. First, determine the mounting surface and clean accordingly. Then apply the provided adhesive or mount using the cable ties and brackets on the backside of the alarm. An alarm can be paired with up to 8 remotes.
[Multi-Purpose Alarm] Use this anti-theft alarm for a variety of purposes: as a luggage alarm, fence alarm, trailer alarm, and more. This device works great as added security when used with locks as well.
[Limited Lifetime Warranty] This product comes with a limited lifetime warranty. Please refer to Fosmon’s website for more information.
Customers say
Customers find the bike alarm works well and is easy to use and install, with clear instructions for settings. The device is loud like a car alarm, with slight vibrations setting it off, and one customer mentions it blips to warn people off. Customers appreciate its value for money, good fit, and security features, with one noting it’s small enough to mount discreetly. The build quality receives positive feedback, with one mentioning it’s strong enough to put under the bike seat.
13 reviews for Fosmon Wireless Bike Alarm Anti-Theft with Remote, Waterproof, Battery Operated, Super Loud 113dB Security Alarm for Bicycle, Motorbike, Mobility Scooter, E-Bike
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£17.99
matthew c. –
Good value
Loud and sensitive but not to sensitive,works as needed.
Jackie –
Excellent
I purchased this item for my mobility scooter. One of the cable ties was broken but I had some in the house so it wasnât a problem.I can be in my house and use the fob to turn the alarm on and off in my garage. The alarm is loud.If I just knock the scooter the alarm gives like a warning siren but if it moves constantly then the alarm screams out loud lol.Itâs nice and neat and canât be seen on my scooter and gives me a little more security. For the price it really is excellent!!! Iâd definitely recommend
Zoidy –
Its very quiet when fitted under the seat. its not useless but not great.
so easy to install just stick it under your seat. I think I will move it to somewhere not so insulated b foam ie under the seat as it does reduce the volume quite a bit. its better than nothing though and easy to use.
Anthony Gilroy –
Cheap effective
Good product
Karl oakley –
Great alarm
Great little bit of kit
MiKey –
Loud
It’s loud like a car alarm. It’s also cheap and easy to use. I would recommend for anyone anxious to leave it anywhere. Bike alarms are still not that popular, so I believe it’ll discouraged big chunk of potential thieves with a surprise noise.
Loopy loo –
10/10
Brilliant alarm works well, and added bonus of scaring the neighbours cat back over the fence when she jumps on the bike
Jonty –
Do not purchase it is seriously poor quality and impossible to replace the batteries.
The quality is seriously poor replacing the batteries is virtually impossible. You actually need to buy another unit. Do not buy.!
Kevlar –
Reçu et testé à l’instant, pour le moment tout est parfait, à voir dans le temps !Le réglage est très facile (il suffit de lire la notice) aucun problème pour paramétrer les différents niveaux de sensibilité, ni pour ouvrir le compartiment à piles.Ca sonne fort !
Sascha Cz. –
Viele Vorteile vorhanden – Material, Bauweise, Steuerbarkeit, Haptik und Sensorik – auch wetterfest im Regen.Wer es aber auch den “Kabelschneider- und Wegwerfdieben” schwer machen möchte, sollte die billigen Kabelbinder aus PVC mit Stahl- Ksbelbindern unter 4,8mm Breite ersetzen. Viel Erfolg!
Gioacchino –
Preso ed ero titubante ma devo dire che fa il suo lavoro come tocco la mi bici suona lo consiglio poco spesa tanta resa suono molto forte
AgogoLIVE –
Great value little alarm that is easily customisable for purpose.7 sensitivity settings3 choice of tonesVolume is customisableWhen 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.
César A. –
Excelente producto, quien toca la moto escucha pitido y se espanta, suena muy fuerte ya viene asà configurado y me gusta, le puedo cambiar pero no quiero, al igual que la sensibilidad; saqué del estuche, retiré el plástico para activar las baterÃas, instalé con la pegatina de 2 caras incluida, aseguré con los 2 cinchos, oprimà el botón circular hasta que apagó la luz y alarma activada, tocas la moto y sirena sonando fuerte como un carro, oprimes el candado abierto y desactivas, aseguro mi moto con 2 candado Abus Bordo Granit X plus plegable y Abus tipo U y este es el complemento perfecto. Soy extremadamente enojón con las cosas de mala calidad que no funcionan a mi gusto, pero éste producto me dejó enteramente satisfecho y todo por menos de $500 pesos mexicanos. Nota: El triangulito de plástico es para cambiar las pilas, te comento porque el fabricante no dió las instrucciones y tampoco dió guia en español