Sensitivity adjustment is not working for me. I follow the instructions, but when I press the button I hear the same 3 pitches.

Do this for step one: hold the unlock button for 6 seconds. In that 6 seconds you'll see the blue light around the lock symbol come on and go off then come back on (you'll also hear some tones but they're not important). It's when the blue light some back on at 6 seconds that you're in business. You can now follow instructions 2 thru 4. That's it.

Is the remote water waterproof???

We bougt the arlam to use indoors. It does say on the box that it is waterproof. Since it is a bike alarm that makes sense.

Will this keep the dogs away when I go fir a walk???

I don’t know if that would work or not. It is very loud and May startle the dog, don’t think it will chase a very aggressive dog away though.

could it be used to prevent catalytic converter thefts?

Not sure unless you just put it on the car in general then it may or may not work for that I keep it on my e-bike works perfectly for that.

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Fosmon Anti Theft Burglar Bike Alarm with Remote, Waterproof Vibration Triggered Battery Operated Loud 113dB Wireless Siren for Bicycle, E-Bike, Motorcycle, Scooter, Cart, Trailer, Equipment, Fence

Product ID: 280129426

Details

Brand
Fosmon
Compatible devices
bicycles carts
Maximum range
90 Feet
Noise level
113 Decibels
Remote control included?
Yes

💧Waterproof & vibration-triggered sensor

📡Wireless remote control (up to 8 remotes)

🔊113dB ultra-loud siren

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VT14565

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚨 Stay a step ahead—secure your ride with Fosmon’s fierce 113dB shield!

SOS TILT DETECTION - Smart SOS alert triggers if your bike tilts over 45°, signaling emergencies beyond theft.
EFFORTLESS WIRELESS SETUP - Pair up to 8 remotes and mount easily with adhesive or cable ties—security made simple.
UNMATCHED 113 D B ALARM POWER - Instantly deters thieves with ear-piercing volume that commands attention.
VERSATILE MULTI USE SECURITY - Protect bikes, e-bikes, scooters, trailers, fences, and more with one sleek, compact device.
CUSTOMIZABLE SENSITIVITY VOLUME - Tailor 7 vibration sensitivity levels and 3 volume settings to your unique ride and environment.

The Fosmon Anti Theft Burglar Bike Alarm delivers a powerful 113dB wireless siren triggered by vibration, featuring adjustable sensitivity and volume levels, SOS tilt detection, and easy installation. Waterproof and compatible with multiple remotes, it offers versatile protection for bikes, scooters, trailers, and more, backed by a limited lifetime warranty.

Specifications

ASIN	B07PQ92SHC
Audible Noise	113 Decibels
Best Sellers Rank	#69,262 in Automotive ( See Top 100 in Automotive ) #69 in Motorcycle Theft Protection
Brand	Fosmon
Compatible Devices	bicycles, e-bikes, scooters, motorcycles, carts, trailers
Customer Reviews	4.4 4.4 out of 5 stars (6,335)
Global Trade Identification Number	00879565005795
Includes Remote	Yes
Item Weight	4 Ounces
Manufacturer	Fosmon
Maximum Range	90 Feet
Mfr Part Number	51087HOM
Model Number	51087HOM
UPC	879565005795
Unit Count	1 Count

Reviews

S**Y

Fonctionne assez bien

22.01.2026

J**A

Excelente producto

24.02.2026

F**W

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

13.08.2024

S**E

Tres efficace. Personne ne touche a mon velo !!

11.03.2026

E**E

Klappt alles super damit. Ist auch sehr zuverlässig. Hatte es am E-Scooter befestigt und jetzt am Fahrrad. Bisher keine Probleme. Das Gerät ist übrigens super laut!

11.01.2026

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