I also have a Hive Hub listed as a separate item that can be combined with this order. There are 5 of these identical devices available and will require a new CR123A battery to work.
eBay
Aqara P1 Door Window Sensor Zigbee 3.0 Smart Home Wireless Anti-theft Homekit Induction Door Magnetic Alarm For HomeKit APP
Aliexpress UK
Easy to install, just place on a surface or use the self-adhesive tape to attach to the corner of the wall. Size H4.8, W4.8, D2.7cm. Batteries required: 1 x Li-Ion (included).
eBay
Ewelink Zigbee Door Sensor Wireless Magnetic Window Open Closed Alarm Detector Works With Zigbee2MQTT Alexa Google Need Gateway
Aliexpress UK
Smart Window & Door Alarm Sensor with Voice Notifications. Remote Alerts: Receive notifications if suspicious activity is detected while you're away. Perfect for working parents, busy professionals, and anyone who values safety.
eBay
Tuya WiFi/ZigBee Door Window Sensor Smart Home Wireless Door Open Close Detectors APP Remote Alarm Work with Alexa Google Home
Aliexpress UK
Hive Motion sensor, new sealed. Requires hub and app.
eBay
Tuya WiFi/ZigBee Door Window Sensor Smart Home Wireless Door Open Close Detectors APP Remote Alarm Work with Alexa Google Home
Aliexpress UK
Hive security system items as per photo . I bought this 3 years ago and never installed . Now the hive system is no longer supported online but the system would still work as a stand alone alarm with Keypad window door trips and siren . Collection only
eBay
KERUI D121 120dB Wireless Door/Windows Sensor Alarm 300ft Anti-Theft Smart Remote Control For Kids Cabinet Safety Home Security
Aliexpress UK
KERUI D121 120dB Wireless Door/Windows Sensor Alarm 300ft Anti-Theft Smart Remote Control For Kids Cabinet Safety Home Security
Aliexpress UK
KERUI 120dB Window/Door Sensor Alarm Wireless 300ft Remote Control For Kids Cabinet Safety Home Security Smart Anti-Theft D121
Aliexpress UK
Sonoff DW2-WiFi Wireless Security Window Door Sensor Home Sercurity Alarm Work With eWeLink APP Support Sonoff Devices IFTTT
Aliexpress UK