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🚨 Stay one step ahead—protect your ride with the alarm that never sleeps!
The Fosmon 113dB Bike Alarm is a high-decibel, vibration-activated security system designed for bicycles, e-bikes, motorcycles, scooters, and trailers. Featuring adjustable sensitivity and volume levels, a 230-foot wireless remote, and an SOS tilt alert, it offers versatile, weatherproof protection with easy installation and a limited lifetime warranty.




| ASIN | B07PQ92SHC |
| Audible Noise | 113 Decibels |
| Best Sellers Rank | 3,566 in Automotive ( See Top 100 in Automotive ) 13 in Motorbike Theft Protection |
| Box Contents | Remote Control, Screws |
| Brand | Fosmon |
| Brand Name | Fosmon |
| Compatible Devices | bicycles, e-bikes, scooters, motorcycles, carts, trailers |
| Compatible devices | bicycles, e-bikes, scooters, motorcycles, carts, trailers |
| Country of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 6,665 Reviews |
| Global Trade Identification Number | 00879565005795 |
| Includes Remote | Yes |
| Item Weight | 4 Ounces |
| Manufacturer | Fosmon |
| Manufacturer Part Number | 51087HOM |
| Maximum Range | 230 Feet |
| Maximum range | 230 Feet |
| Model Number | 51087HOM |
| Noise level | 113 Decibels |
| Number of Items | 1 |
| Remote control included? | Yes |
| UPC | 879565005795 |
| Unit Count | 1.0 count |
R**N
Does what it is supposed to do.
Put this under the seat of my motorcycle. Works perfectly and is nice and loud. Comes with all batteries, so no need to wire it up to the bike's battery. Installed in minutes. Very happy with it.
M**S
Good and loud
Good item good to be safe, quite loud
S**E
Brilliant theft deterrent
I bought this for my wife's e-bike whilst touring Europe in our motorhome. The device is easy to fit but be sure to use both the double sided tape and zip ties to prevent it from easily being prised often and discarded. It's quite large so you may need to give some thought about where you locate it. Also you need to be sure you leave access to the screw for battery replacement. Otherwise you may have to cut it off and require fresh tape and zip ties to re-fit. Once fitted just remove the plastic battery isolating tab and it's ready to go. Setting is easy once you have read the included instruction sheet. The alarm is really loud!! It sounds a warning blast if accidentally nudged. Move it further and it delivers a continued blast of varying tones that attracts immediate attention. Of course it's not a substitute for a good lock, however if the bike is within earshot during a coffee stop I'm confident enough not to use a lock. I forgot I'd set it on one occasion and the warning blast even made me jump! So pleased with it I've just ordered a second one for my own bike. Only negative is the loop on the remote is made of thin plastic and has already snapped when attached to another key fob. Hence four stars otherwise it would have been five.
E**N
Great way to protect more than just bikes!!
I am using 2 of these on my campervan, one on the bike rack which protects bikes and attack on the rear door and one on the sliding door. Pairing them was easy enough and so I have 2 remotes operating both alarms. I had to use cable ties which was easy on the bike rack but had to use separate cable tie holders on the door. They do a fantastic job of preventing low life from attempting to access the van. They work in the same way to the much more expensive, but better packaged Vanguardian alarms. One issue though, they are very difficult to open to change the batteries, hence not being able to stick them directly on the van
P**L
Excellent.
They are excellent and great value for money, I bought another two alarms.
W**G
Superb alarms
Superb alarm. So good, i wanted another for one of my other bikes, but was concerned about frequncy clash between the two. I contacted the seller in the USA and they were very quick to respond and super helpful. I bought my second one and they bother work brilliantly. I thoroughly recommend these alarms.
K**N
Scooter
Nice & slim , easy set very load piece of mind . Fitted to a moblity scooter which is stored outside under a cover .
A**R
Not loud enough.
Great bit of kit and deafening when first opened. Put it under a motorcycle seat and the noise is extremely muffled. Possibly a good deterrent as if does beep if the bike is bumped. So good to have along with other security measures (brake lock in my case) but probably not good enough as a stand alone security measure.
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
T**N
Great bit of added security
This thing is great so far! Nearly deafened myself by testing it inside a small office 😂. Very discrete as well, I was able to attach it to my bike In such a way as to be nearly invisible. It's plenty sensitive to movement on default settings, a small jostle from people putting bikes in the rack beside me won't set it off, but a real attempt to move my bike absolutely will.
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.
Trustpilot
1 month ago
3 days ago