It prevents your children from sneaking out the door or intruders from entering. 【Four alarm modes】 There are 4 different alarm modes: 1. open door alarm mode. anti-theft mode for valuables. 4 SOS mode.
eBay
Ewelink Zigbee Door Sensor Wireless Magnetic Window Open Closed Alarm Detector Works With Zigbee2MQTT Alexa Google Need Gateway
Aliexpress UK
Open the door and see if the siren sounds. 2/4/6/8/10X Alarm Kit (alarm unit & magnetic sensor). Sensor type: alarm. Magnetic sensor: 9X3X2CM. Alarm type: sound. Alarm unit: 4.5X1.5X1.5CM. Fix the host to the door / window with double-sided tape.
eBay
KERUI D121 120dB Wireless Door/Windows Sensor Alarm 300ft Anti-Theft Smart Remote Control For Kids Cabinet Safety Home Security
Aliexpress UK
(2) Wireless Gap Sensors. Note:the item must work with alarm system,it can not work independent. 1/2/ 3/4/5/6/8/10/20x Wireless Door Sensor.
eBay
KERUI 120dB Window/Door Sensor Alarm Wireless 300ft Remote Control For Kids Cabinet Safety Home Security Smart Anti-Theft D121
Aliexpress UK
This alarm is the perfect way to protecting your home or place of business against theft. The alarm function is triggered using a magnetic sensor or using the provided remote control. You can arm, disarm, sound alarm and change to the doorbell function using the remote. This is ideal for shops and offices. The 110 decibel alarm is perfect on windows, doors and sheds to protect your goods. Features: 100% brand new and high quality Super loud 110 dB alarm Convenience in installation, just peel and stick Super environmental suitability and stability Dustproof and insect prevention Easily mounted by adhesive Ideal entry warning for homes, apartments, mobile homes and more.
eBay
Sonoff DW2-WiFi Wireless Security Window Door Sensor Home Sercurity Alarm Work With eWeLink APP Support Sonoff Devices IFTTT
Aliexpress UK
LOW BATTERY CONSUMPTION - The alarm system's low battery consumption ensures a long life for the alarm. 90 DECIBLE - The security alarm is super powerful because it has a range of 90 decibels. So you can hear the alarm everywhere.
eBay
Ewelink Zigbee 3.0 Door Sensor Wireless Magnetic Window Open Closed Security Alarm Detector work with Home Assistant Zigbee2MQTT
Aliexpress UK
Trigger distance: Alarm sounds when the gap between unit & magnet isover 10mm. Choose1x / 4x / 8x to match your needs. The90dB alarm is designed to alert you of unauthorised entry, helping to deter intruders and keep your family safe.
eBay
Aqara Door Window Sensor Zigbee Matter Smart Home Mini Wireless Alarm Low Power Works with Apple HomeKit Xiaomi Mi Home and More
Aliexpress UK
It will alarm when the door or window is opened, and will stop alarm once you close the door or window. Alarm mode switch button---Switch alarm mode and dingdong mode. Normal Alarm Mode. SOS button---Regardless of disarming or arming, press this button and the alarm will lasts for one minute unless you press “SET” button on the alarm or press "Disarm" button on the remote to turn it off early.
eBay
Wireless IR Alarm Doorbell with Motion Sensor - 2 Transmitters, 1 Receiver for Driveway/Garage
Aliexpress UK
Tuya WIFI Alarm System. The Alarm Host will alarm when the detector be triggered no matter what state the WIFI loudspeaker. When the door sensors ,PIR sensors,curtain detector or other sensor be triggered,this siren will sound.
eBay
KERUI Wireless 433MHz D025 Window Door Sensor Magnet Detector For W181 W184 W204 Home Security Alarm System Burglar An-theft
Aliexpress UK