---
product_id: 96229782
title: "HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care"
brand: "hendun"
price: "€ 20.31"
currency: EUR
in_stock: true
reviews_count: 9
category: "Hendun"
url: https://www.desertcart.de/products/96229782-hendun-wireless-remote-door-alarm-when-opened-windows-open-alarms
store_origin: DE
region: Germany
---

# Wireless remote control pairing 105dB piercing alarm Uses easy-change AAA batteries HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care

**Brand:** hendun
**Price:** € 20.31
**Availability:** ✅ In Stock

## Summary

> 🔐 Stay one step ahead with wireless security that works as hard as you do.

## Quick Answers

- **What is this?** HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care by hendun
- **How much does it cost?** € 20.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/96229782-hendun-wireless-remote-door-alarm-when-opened-windows-open-alarms)

## 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

- • **Tailored Alert Modes:** Choose between doorbell chime, loud alarm, or panic mode to suit your home or care environment needs.
- • **Loud & Clear Security:** 105dB alarm instantly alerts you to unauthorized entry or wandering kids, ensuring peace of mind.
- • **Smart Battery Convenience:** Powered by standard AAA batteries for quick replacement without the fuss of specialty cells.
- • **Seamless Multi-Device Control:** Pair up to 8 remotes with one sensor or control multiple sensors with a single remote for ultimate flexibility.
- • **Effortless Installation & Operation:** Magnetic sensor mounts easily on doors/windows with no wiring hassle—perfect for busy professionals.

## Overview

The HENDUN Wireless Remote Door Alarm is a compact, magnetic contact sensor system designed for home security and safety monitoring. It emits a powerful 105dB alarm when doors or windows are opened, ideal for protecting children, dementia patients, or securing pools. Featuring wireless remote control pairing with up to 8 remotes per sensor, it offers flexible multi-point monitoring. Powered by easy-to-replace AAA batteries, it combines convenience with robust security in a sleek, wall-mountable design.

## Description

desertcart.com: HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care : Electronics

Review: I had difficulty with instructions, but THIS IS A GOOD PRODUCT - This uses AAA batteries. they are easier to change when mounted than watch batteries which is why I bought them. You can have one remote control several or have up to eight remotes control one. Choice between doorbell noise or loud alarm (or off or panic mode). Alarm is loud and runs for 30 seconds even if you shut the door again, pauses for 15 seconds and will reset if the door is shut or sound again if it is not. Can be shut off with the remote. If a remote is not pared with that particular alarm, it will not work, so you can't just buy a remote and shut off someone's alarms Remote Control Code Pairing The main unit and the remote control have been coded-pairing at the factory, so the remote control can be used without any setting by yourself. How to enter the code pairing state: Press the [UNLOCK] disarm key of the remote control to enter the disarm mode, press and hold the [BELL] code pairing key for 10s (ignore the bell/- chime sound from the main unit), and release it when you hear a “Bi” sound from the main unit. Then the main unit has entered the code pairing state. Pairing the second remote or more remotes: After the main unit has entered the code pairing state, immediately press the arm or disarm key of the un-coded remote control [UNLOCK/LOCK], the main unit will emit two “Bi Bi” sounds to indicate successful pairing. Using this method, one main unit can code up to 8 remote controls. Delete all pairs of codes: After entering the code pairing state by referring to the method in 5.5.1, immediately press the emergency key of the remote control [LIGHTNING BOLT], the main unit will emit a ‘Bi’ sound, and all the remote controllers connected to the main unit will be deleted from the code pairing information. * - THIS DELETES ALL REMOTES INCLUDING THE ONE I WAS USING - * How to code the first remote control: take out the batteries of the main unit, re-install the batteries after 2 minutes, press and hold down the [BELL] code key within 2s after you hear the ‘Bi’ sound from the main unit, * - AND KEEP IT PRESSED - * the the main unit will emit the ‘Bi’ sound after about 10s, at this time, release the code key, and then press the arm or disarm key, the main unit will emit 2 “Bi Bi” to indicate the success of the code pairing. i HAD PROBLEMS FOLLOWING INSTRUCTIONS
Review: Well made, works very well - Works very well. Alarm is very loud and so is the chime (a little too loud ). I purchased 3 alarms with 3 remotes. I programmed all three of the alarms to work with one remote. The directions are a little confusing but once you figure it out, it is easy. Not sure how long the batteries last ( I just installed them today ). I installed them because we have a grandson and a swimming pool.

## Features

- Easy to install and operate - gate/doo/burglar alarm alarm with remote control/keyfob
- Multi-purpose - magnetic door alarms/doorbell chime/pool door alarm
- More remote and sensor paired each other -one magnetic sensor can match with at most 8 remote freely,one remote could control several sensors. Second remote ASIN B084VTYF51
- Magnetically triggered alarm sounds--105db when window or interior door is opened by kids & dementia patients. Low battery indicator and prompt tone.
- REMINDER: Returned because the volume is not adjustable and not compatible with the pool UL 2017, although it is very easy to use and effective.
- Another HENDUN item is an upgraded version that can adjust the volume. ASIN B0F9B2FDSP

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07J449TKB |
| Batteries | 2 AAA batteries required. |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #356 in Home Security Systems |
| Control Method | Remote |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,679) |
| Date First Available | October 7, 2018 |
| Description Pile | Alkaline |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.39 ounces |
| Item model number | SZSF03R |
| Manufacturer | Changzhou Hengdun Electronic Technology Co Ltd |
| Mounting Type | Wall Mount |
| Noise Level | 105 Decibels |
| Number of Batteries | 2 AAA batteries required. |
| Part Number | SZSF03R |
| Product Dimensions | 4.13 x 2.76 x 2.36 inches |
| Sensor Technology | Contact Sensor |
| Size | 1 pack |
| Special Features | alarm with remote, wireless |
| UPC | 664248681751 |
| Voltage | 12 Volts |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** HENDUN
- **Color:** black
- **Power Source:** Battery Powered
- **Product Dimensions:** 1.57"L x 0.59"W x 3.35"H

## Images

![HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care - Image 1](https://m.media-amazon.com/images/I/31HVqldhZgL.jpg)
![HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care - Image 2](https://m.media-amazon.com/images/I/41qiYDXUn4L.jpg)
![HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care - Image 3](https://m.media-amazon.com/images/I/512c-scicdL.jpg)
![HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care - Image 4](https://m.media-amazon.com/images/I/51DXgO7j5UL.jpg)
![HENDUN Wireless Remote Door Alarm When Opened, Windows Open Alarms, Magnetic Security Sensor, Pool Safety for Kids, Alzheimer's Care - Image 5](https://m.media-amazon.com/images/I/51JFK2ZBSaL.jpg)

## Questions & Answers

**Q: Can I add a remote control?**
A: Yes, after a simple pairing process. extra remote ASIN B084VTYF51

**Q: Is it compatible with UL 2017?**
A: No. Although it is easy to use and simple.

**Q: Can the volume be adjusted?**
A: No. You can switch to doorbell mode, which will reduce the volume. Alternatively, you can choose other upgraded versions available at our store that allow you to adjust the volume.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I had difficulty with instructions, but THIS IS A GOOD PRODUCT
*by B***N on March 5, 2024*

This uses AAA batteries. they are easier to change when mounted than watch batteries which is why I bought them. You can have one remote control several or have up to eight remotes control one. Choice between doorbell noise or loud alarm (or off or panic mode). Alarm is loud and runs for 30 seconds even if you shut the door again, pauses for 15 seconds and will reset if the door is shut or sound again if it is not. Can be shut off with the remote. If a remote is not pared with that particular alarm, it will not work, so you can't just buy a remote and shut off someone's alarms Remote Control Code Pairing The main unit and the remote control have been coded-pairing at the factory, so the remote control can be used without any setting by yourself. How to enter the code pairing state: Press the [UNLOCK] disarm key of the remote control to enter the disarm mode, press and hold the [BELL] code pairing key for 10s (ignore the bell/- chime sound from the main unit), and release it when you hear a “Bi” sound from the main unit. Then the main unit has entered the code pairing state. Pairing the second remote or more remotes: After the main unit has entered the code pairing state, immediately press the arm or disarm key of the un-coded remote control [UNLOCK/LOCK], the main unit will emit two “Bi Bi” sounds to indicate successful pairing. Using this method, one main unit can code up to 8 remote controls. Delete all pairs of codes: After entering the code pairing state by referring to the method in 5.5.1, immediately press the emergency key of the remote control [LIGHTNING BOLT], the main unit will emit a ‘Bi’ sound, and all the remote controllers connected to the main unit will be deleted from the code pairing information. * - THIS DELETES ALL REMOTES INCLUDING THE ONE I WAS USING - * How to code the first remote control: take out the batteries of the main unit, re-install the batteries after 2 minutes, press and hold down the [BELL] code key within 2s after you hear the ‘Bi’ sound from the main unit, * - AND KEEP IT PRESSED - * the the main unit will emit the ‘Bi’ sound after about 10s, at this time, release the code key, and then press the arm or disarm key, the main unit will emit 2 “Bi Bi” to indicate the success of the code pairing. i HAD PROBLEMS FOLLOWING INSTRUCTIONS

### ⭐⭐⭐⭐⭐ Well made, works very well
*by R***S on July 30, 2025*

Works very well. Alarm is very loud and so is the chime (a little too loud ). I purchased 3 alarms with 3 remotes. I programmed all three of the alarms to work with one remote. The directions are a little confusing but once you figure it out, it is easy. Not sure how long the batteries last ( I just installed them today ). I installed them because we have a grandson and a swimming pool.

### ⭐⭐⭐⭐⭐ Works inside of my steel safe
*by K***N on March 19, 2022*

I wanted something extra to make noise when my steel safe was opened without my consent. I mounted the alarm box inside the safe. I placed the magnetic strip on the door. I used double sided tape to hold them in place. I didn't use the provided tape since I was doing an unusual install and already had the perfect sized tape for it. But that seemed of high quality. I am able to activate/deactivate the alarm when the safe is closed and locked using the remote. I can hear the alarm/beeps when safe is closed, but more importantly it's very loud when opened (despite being muffed by 3 steel walls). Though I can hear it on the floor above me, I can't really hear it on the third floor. Very loud. Loud enough to make a point. Any louder would be overkill for me. When the batteries start to die in the alarm, it makes a creepy sound like a Geiger counter. I'm sure this was unintentional but I actually like that. It's a unique sound in my home of so many sounds. Generic dollar store batteries lasted about 2 months of daily usage. If you put this on a door/window in your house, it will surely wake you up.

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-09*