---
product_id: 100034449
title: "touch door alarm"
brand: "hendun"
price: "HK$259"
currency: HKD
in_stock: true
reviews_count: 13
category: "Hendun"
url: https://www.desertcart.hk/products/100034449-touch-door-alarm
store_origin: HK
region: Hong Kong
---

# IP55 waterproof design 113dB super loud alarm 7-level adjustable sensitivity touch door alarm

**Brand:** hendun
**Price:** HK$259
**Availability:** ✅ In Stock

## Summary

> 🚨 Protect your ride with the loudest, smartest, and sleekest alarm on the block!

## Quick Answers

- **What is this?** touch door alarm by hendun
- **How much does it cost?** HK$259 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/100034449-touch-door-alarm)

## Best For

- hendun enthusiasts

## Why This Product

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

## Key Features

- • **113dB Alarm That Demands Attention:** A piercing siren loud enough to scare off even the boldest thieves—because your ride deserves the best defense.
- • **Command Control at Your Fingertips:** Updated remote with SOS and vehicle finder functions keeps you connected and in control up to 20 meters away.
- • **Tailored Sensitivity for Every Ride:** Seven vibration sensitivity levels let you customize alerts from gentle taps to heavy impacts—no false alarms, just smart security.
- • **Fearless Security in a Compact Package:** Mini size fits discreetly on bikes, scooters, and more—stealthy protection wherever you ride.
- • **Weatherproof and Wire-Free Installation:** IP55 waterproof rating and no-wiring setup with strong adhesive and cable ties means hassle-free, durable mounting anywhere.

## Overview

The Upgraded Bike Alarm is a compact, wireless anti-theft device featuring a powerful 113dB vibration-triggered siren, adjustable 7-level sensitivity, and an IP55 waterproof rating. Controlled via a remote with SOS and vehicle finder functions, it installs easily without wiring, making it ideal for bikes, scooters, and electric vehicles seeking reliable, customizable security.

## Description

Buy Upgraded Bike Alarm Waterproof with Remote, Electric Bicycle Door Burglar Alarm,eBike Anti Theft 113dB Loud, Adjustable Sensitivity, Scooter Accessories Vibration Sensors: Alarm Systems - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Surprisingly effective! - This little alarm is great. I purchased it for my golf cart. The sensitivity is perfect for our use. The first few days we had it I kept triggering the warning chirps because I was forgetting it was connected to the cart and not disarming it before getting onto the cart. Just enough sensitivity to go off without being over active. It has nice modern arm and disarm sounds and also has an option to change the sound that you use if you press one of the buttons on the fob as a "car finder" type sound. I like to trigger this sound when we drive or cart to a local store so people know it has an alarm system. The main alarm sound, after being set off by vibration, is the typical siren alarm sound you hear on most vehicle alarm systems. All of the sounds ate very loud. I Love that it's totally wireless and affordable, yet very effective. Its been about 1.5 week's since install (took 3 minutes) and I would definitely purchase it again.
Review: Sound the alarm! - First off, I am a real unpaid desertcart customer. This alarm is amazing. Just loud enough the scare off the bravest of Thieves. The motion sensor is sensitive butt it gives a warning before the full alarm goes off. So if it's windy, the pre alarm might sound and if it keeps getting jostled around the full alarm will come on. Otherwise, just the warning will sound if no more motion is detected. The key fob is simple and does exactly what it should do. Actually doesn't feel cheaply made nor is it the best I've ever used. Time will tell. For now I'll say that this is a very functional and easy to operate alarm and well well worth the money.

## Features

- SUPER LOUD 113DB - Vibration triggering loud alarm to scare away thieves.Prevent Robbery and Door Prying.
- ADJUSTABLE SENSITIVITY - High sensitive vibration sensor,7 level from gentle touch to push or beat.Adjustable volume.
- EASY OPERATION - Control with updated remote(keyfob), searching vehicle and fall for help SOS function. Second remote ASIN B084VTYF51
- EASY INSTALLATION FIRM AND WATERPROOF - No wiring, no screw，provide super strong adhesive tapes and cable tie for installation.IP55 waterproof design, can use for outdoor.
- MINI SIZE - 3.7"*1.6"*0.8" exquisite and compact design, easy to hide and install, suitable for bike/car/motorcycle/door/moped anti-theft alarm.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KPKLBCR |
| Batteries | 3 AAA batteries required. |
| Best Sellers Rank | #134,609 in Automotive ( See Top 100 in Automotive ) #45 in Antitheft Alarm Systems |
| Control Method | Remote |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,842) |
| Date First Available | November 19, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.5 ounces |
| Item model number | KS-SF22R |
| Manufacturer | Changzhou Hengdun Electronic Technology Co Ltd |
| Maximum Range | 10 Meters, 20 Meters |
| Mounting Type | Surface |
| Noise Level | 113 Decibels |
| Product Dimensions | 3.7 x 1.8 x 0.6 inches |
| Sensor Technology | Vibration Sensor |
| Size | vibration alarm |
| UPC | 664248633569 |
| Voltage | 12 Volts (DC) |
| Wireless Remote | Yes |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** HENDUN
- **Color:** Black
- **Number of Batteries:** 3 AAA batteries required.
- **Power Source:** Battery Powered

## Images

![touch door alarm - Image 1](https://m.media-amazon.com/images/I/61LsgHcNRpL.jpg)
![touch door alarm - Image 2](https://m.media-amazon.com/images/I/61bWuXmp4aL.jpg)
![touch door alarm - Image 3](https://m.media-amazon.com/images/I/61x7ofw0QmL.jpg)
![touch door alarm - Image 4](https://m.media-amazon.com/images/I/61yIEw-yv-L.jpg)
![touch door alarm - Image 5](https://m.media-amazon.com/images/I/61zACwxW8fL.jpg)

## Questions & Answers

**Q: How do i get my alarm to turn off if i lost my keyfob**
A: It can be turned off after taking out the battery, refer to the manual.

**Q: how long does the alarm stay before it shuts its self off...and will it go on again if disturbed?**
A: Any touch or hit is occurred at ARM alert mode, the main unit will sound immediately for 2 seconds, detect on any touch or hit again within 2～ 12 seconds, the alarm will continue for 30 seconds. Thanks.

**Q: I use this on my kayak- it is on the car in the driveway overnight when I leave early.  I would like extra remotes, one in the car,one in the house.**
A: Thank you for purchasing and asking questions. The additional remote control link is this: https://www.amazon.com/dp/B084VTYF51

**Q: I have an electric car. Could I put this in the trunk, set at it lowest level of sensitivity, and use the remote to sound it to alert a pedestrian?**
A: You can have it in the "off" setting. The remote has a button that will work as an "alert buzzer" even when the alarm is off. The lowest sensitivity setting would be triggered from a moving car if you had it armed. Just leave it off--or un-armed--and you can use the alert button if you need to make a sound with it. It's very loud & noticeable.
~JSV

## Customer Reviews

### ⭐⭐⭐⭐⭐ Surprisingly effective!
*by J***S on May 15, 2020*

This little alarm is great. I purchased it for my golf cart. The sensitivity is perfect for our use. The first few days we had it I kept triggering the warning chirps because I was forgetting it was connected to the cart and not disarming it before getting onto the cart. Just enough sensitivity to go off without being over active. It has nice modern arm and disarm sounds and also has an option to change the sound that you use if you press one of the buttons on the fob as a "car finder" type sound. I like to trigger this sound when we drive or cart to a local store so people know it has an alarm system. The main alarm sound, after being set off by vibration, is the typical siren alarm sound you hear on most vehicle alarm systems. All of the sounds ate very loud. I Love that it's totally wireless and affordable, yet very effective. Its been about 1.5 week's since install (took 3 minutes) and I would definitely purchase it again.

### ⭐⭐⭐⭐⭐ Sound the alarm!
*by M***M on January 14, 2020*

First off, I am a real unpaid Amazon customer. This alarm is amazing. Just loud enough the scare off the bravest of Thieves. The motion sensor is sensitive butt it gives a warning before the full alarm goes off. So if it's windy, the pre alarm might sound and if it keeps getting jostled around the full alarm will come on. Otherwise, just the warning will sound if no more motion is detected. The key fob is simple and does exactly what it should do. Actually doesn't feel cheaply made nor is it the best I've ever used. Time will tell. For now I'll say that this is a very functional and easy to operate alarm and well well worth the money.

### ⭐⭐⭐⭐ Works as it described
*by C***Y on October 29, 2025*

Works as it should. No complaints. I use it for my golf cart.

## Frequently Bought Together

- Upgraded Bike Alarm Waterproof with Remote, Electric Bicycle Door Burglar Alarm,eBike Anti Theft 113dB Loud, Adjustable Sensitivity, Scooter Accessories Vibration Sensors
- Apple AirTag

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**Shop now:** [https://www.desertcart.hk/products/100034449-touch-door-alarm](https://www.desertcart.hk/products/100034449-touch-door-alarm)

---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-30*