---
product_id: 125456438
title: "Sanjie Door Window Alarms When Opened, 8 Pack, Volume Control | Easy-install door and window alarms with loud adjustable alerts, long battery life, and versatile use for home safety"
brand: "sanjie"
price: "¥15559"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/125456438-sanjie-door-window-alarms-when-opened-8-pack-volume-control
store_origin: JP
region: Japan
---

# 125dB max volume alarm 12-month battery life Easy 3M tape installation Sanjie Door Window Alarms When Opened, 8 Pack, Volume Control | Easy-install door and window alarms with loud adjustable alerts, long battery life, and versatile use for home safety

**Brand:** sanjie
**Price:** ¥15559
**Availability:** ✅ In Stock

## Summary

> 🚪🔔 Stay one step ahead with Sanjie’s smart door alarms—because peace of mind never goes out of style.

## Quick Answers

- **What is this?** Sanjie Door Window Alarms When Opened, 8 Pack, Volume Control | Easy-install door and window alarms with loud adjustable alerts, long battery life, and versatile use for home safety by sanjie
- **How much does it cost?** ¥15559 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/125456438-sanjie-door-window-alarms-when-opened-8-pack-volume-control)

## Best For

- sanjie enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Setup:** Peel, stick, and activate—no tools or wiring needed for instant protection.
- • **Long-Lasting Power:** Up to 12 months of continuous security with included alkaline batteries and low-battery alerts.
- • **Versatile Safety Use:** Perfect for doors, windows, cabinets, and even pool gates—protect what matters most.
- • **Unmatched Security Alert:** 125dB loud alarm ensures no unauthorized entry goes unnoticed.
- • **Customizable Volume Modes:** Choose between loud alarm or gentle chime to suit your environment and needs.

## Overview

Sanjie Door Alarms provide a powerful 125dB alert triggered by magnetic contact sensors, ideal for securing doors, windows, and more. With easy peel-and-stick installation, three volume modes, and a long-lasting 12-month battery life, this 8-pack offers versatile, reliable protection for homes, offices, and travel. Designed for safety-conscious professionals seeking effortless, effective security solutions.

## Description

Full description not available

## Features

- Peace of Mind - Door window alarms guard you and your home's security. Alarms can also keep the safety of kids as well as the elderly who need care
- Wide Use - Magnetic sensor will alarm or chime if separated.Can be used in pool, home, apartment, store, office, garage, RV, warehouse, hotel and more. Alarm sensor can be installed on sliding door/window, cabinet, drawer, etc
- Easy to Install - Tear off the 3M double-sided tape on the back of the wireless alarm and install it on the door or window, etc. Turn on the switch, set the mode and ready to use. It is recommended that the alarm be installed indoors
- Volume Control - Alarms have 3 modes:125dB Alarm(loud enough), 100dB Alarm, 100dB Chime (dingdong 2 times). When the door window sensor is opened,it will alarm continuously for 30 seconds and will not stop until the window or door is closed
- Long Battery Life - Powered by 3 LR44 button batteries supplied. Normal life of the alarm is up to 12 months. When the alarm is in low battery, the indicator light will flash to alert you

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Battery Description | Alkaline |
| Control Method | Touch |
| Noise Level | 110 dB |
| Mounting Type | Window Mount, Door Mount |
| Sensor Technology | Contact Sensor |
| UPC | 682228238276 |
| Manufacturer | SanJie |
| Part Number | YYDOA01 |
| Item Weight | 10.1 ounces |
| Product Dimensions | 2.91 x 3.54 x 3.94 inches |
| Item model number | DA03S-8 |
| Is Discontinued By Manufacturer | No |
| Style | 8 PACKS |
| Material | plastic |
| Shape | Oval |
| Installation Method | Self-Adhesive |
| Item Package Quantity | 1 |
| Number Of Pieces | 3 |
| Included Components | Magnets |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Description Pile | Alkaline |
| Average Battery Life | 3 	years |
| Warranty Description | lifelong |

## Product Details

- **Color:** White
- **Brand:** SanJie
- **Power Source:** Battery Powered
- **Compatible Devices:** Home Security System
- **Product Dimensions:** 2.9"L x 0.4"W x 1.5"H

## Images

![Sanjie Door Window Alarms When Opened, 8 Pack, Volume Control | Easy-install door and window alarms with loud adjustable alerts, long battery life, and versatile use for home safety - Image 1](https://m.media-amazon.com/images/I/71q67pIUtOL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are the alarms easy to install?**
A: YES. Just remove the 3M double-sided tape and ensure the gap between the alarm does not exceed 0.4in.The arrows of the alarm are aligned with each other.

**Q: How long do the batteries typically last?**
A: The batteries are already built into the alarm. 1 Alarm Pack for 3*LR44 batteries and will last 12 months normally.

**Q: Can the volume of the alarm be adjusted?**
A: YES. The alarm has 3 modes, Mode 1: 125dB alarm, Mode 2: 100dB alarm, Mode 3: 100dB “ding dong” 2 times. The alarm maximum sound loud enough to deter intruders.

**Q: Are the alarms suitable for use on sliding doors or windows?**
A: YES. Alarms are generally available for sliding doors/windows. For best performance, make sure the alarm is mounted in a position that detects movement.

**Q: Does alarm false alarm easily?**
A: NO. Alarm sounds immediately upon separation and lasts for 30s before stopping unless the door/window is closed.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Great for Me!
*by W***M on August 12, 2019*

This product does exactly what its intended to, and that's to startle intruders, or notify the owner of surprise entrances or exits. Its loud enough up front to startle anyone that isn't expecting it, and hopefully cause the intruder(s) to run away in fear. If you are upstairs, or are many rooms away with loud background noise, it could potentially drown out the alarm. So do not only rely on the noise of this alarm for safety, please please please always be aware of your surroundings and be safe and cautious. Otherwise this product is great, works simply, and is easy to install with adhesive attached to the back of each device. It also comes with batteries in each device, but just go ahead and order extras so that in the future you always have them to replace dead ones right away. Watch the illustration video provided, and you can get a good grasp of what this device does, and if it'll be effect for you!

### ⭐⭐⭐⭐⭐ Great, but be careful
*by N***L on July 9, 2022*

It works as intended, however I have to warn people not to install this around kids/babies/toddlers/pets and if you can wear ear plugs because it’s been four hours and my ear won’t stop ringing since i briefly heard the alarm. It’s very frustrating and is showing no signs of stopping.There is no doubt I can hear it from my window well in my basement to my third story even with a fan. It sounds very legit and if I didn’t know better I would assume it was hooked up to a professional security system. I believe my neighbors would hear it in their own house, it’s that loud.This would be great for people with curious toddlers or kids who you fear might sneak out the door. You can set it high and they can’t reach it, the sticky tape is very impressive and strong.It works, gives me peace of mind.

### ⭐⭐⭐⭐ Works well for the price
*by S***M on May 23, 2025*

This product does exactly as advertised. They are easy to install and VERY loud. I've only had for about a week but so far they seem to be functioning well. I have these only my doors and windows. They work perfectly for the door but I do wish they were just a little bit narrower to fit in the window better. Overall they work great especially for the price.

## Frequently Bought Together

- Sanjie Door Alarms When Opened,Door/Window Alarm Sensors for Kids Safety/Home Security/Pool/Garage/Dementia/Toddler/Travel Security,Easy to Install,Volume Control/Loud Alert,Long Battery Life,8 Pack
- LiCB 20 Pack LR44 AG13 357 303 SR44 Battery 1.5V Button Coin Cell Batteries

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-06*