---
product_id: 128089341
title: "113db Bike Alarm with Remote, Motion Sensor Bicycle SOS Alarm, IP65 Waterproof Anti Theft Alarm System, Wireless Siren for E-Bike, Motorcycle, Scooter, Cart, Trailer"
brand: "fosmon"
price: "¥6291"
currency: JPY
in_stock: true
category: "Fosmon"
url: https://www.desertcart.jp/products/128089341-113db-bike-alarm-with-remote-motion-sensor-bicycle-sos-alarm
store_origin: JP
region: Japan
---

# IP65 waterproof rating 230ft remote control range 113dB ultra-loud siren 113db Bike Alarm with Remote, Motion Sensor Bicycle SOS Alarm, IP65 Waterproof Anti Theft Alarm System, Wireless Siren for E-Bike, Motorcycle, Scooter, Cart, Trailer

**Brand:** fosmon
**Price:** ¥6291
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 113db Bike Alarm with Remote, Motion Sensor Bicycle SOS Alarm, IP65 Waterproof Anti Theft Alarm System, Wireless Siren for E-Bike, Motorcycle, Scooter, Cart, Trailer by fosmon
- **How much does it cost?** ¥6291 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/128089341-113db-bike-alarm-with-remote-motion-sensor-bicycle-sos-alarm)

## Best For

- fosmon enthusiasts

## Why This Product

- Trusted fosmon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **SOS Emergency Alert:** Auto SOS triggers when your bike tilts over 45°, signaling for urgent help.
- • **Effortless Setup & Control:** Mount with adhesive or ties, pair up to 8 remotes for seamless access.
- • **Unmatched Theft Deterrence:** 113dB alarm shatters silence to scare off thieves instantly.
- • **Versatile Security Solution:** Protect bikes, scooters, trailers, and more with one smart alarm.
- • **Precision Vibration Detection:** 7 sensitivity levels tailor alerts to your ride’s unique environment.

## Overview

The Fosmon 113dB Bike Alarm is a rugged, IP65 waterproof anti-theft system designed for bicycles, e-bikes, scooters, motorcycles, and trailers. Featuring a powerful 113dB siren, adjustable vibration sensitivity, and an SOS tilt alert, it offers customizable security with remote control access up to 230 feet. Easy to install and versatile, it’s the ultimate smart defense for your ride, backed by a limited lifetime warranty.

## Description

Buy Fosmon 113db Bike Alarm with Remote, Motion Sensor Bicycle SOS Alarm, IP65 Waterproof Anti Theft Alarm System, Wireless Siren for E-Bike, Motorcycle, Scooter, Cart, Trailer: Alarm Systems - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- [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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PQ92SHC |
| Audible Noise | 113 db |
| Best Sellers Rank | #47,346 in Automotive ( See Top 100 in Automotive ) #17 in Antitheft Alarm Systems |
| Brand | Fosmon |
| Compatible Devices | bicycles, e-bikes, scooters, motorcycles, carts, trailers |
| Customer Reviews | 4.5 4.5 out of 5 stars (6,675) |
| Global Trade Identification Number | 00879565005795 |
| Item Weight | 4 ounces |
| Manufacturer | Fosmon |
| Maximum Range | 230 feet |
| Mfr Part Number | 51087HOM |
| Model Number | 51087HOM |
| Number of Items | 1 |
| UPC | 879565005795 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Fosmon
- **Compatible Devices:** bicycles, e-bikes, scooters, motorcycles, carts, trailers
- **Global Trade Identification Number:** 00879565005795
- **Maximum Range:** 230 feet
- **Noise Level:** 113 db

## Images

![113db Bike Alarm with Remote, Motion Sensor Bicycle SOS Alarm, IP65 Waterproof Anti Theft Alarm System, Wireless Siren for E-Bike, Motorcycle, Scooter, Cart, Trailer - Image 1](https://m.media-amazon.com/images/I/61k15Hd86rL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

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

**Q: Is the remote water waterproof???**
A: 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.

**Q: Will this keep the dogs away when I go fir a walk???**
A: 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.

**Q: could it be used to prevent catalytic converter thefts?**
A: 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.

## Frequently Bought Together

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-17*