Product life span: 10 year. Battery life: 2 x 1.5 V AA (replaceable battery Included) replaceable battery Included. Sounds a loud 85 dB alarm. Optical smoke sensing technology detects slow smouldering fire.
eBay
Wireless Door Stop Alarm System120dB With Door Lock Home Security Kit Anti-Theft Alarm System Portable Door Stoppers Alarm Siren
Aliexpress UK
2x Smoke detector. Sounds a loud 85 dB alarm. Optical smoke sensing technology detects slow smouldering fire. Battery life: 2 x 1.5 V AA battery（batteries are not included）. Large central test and silence button feature.
eBay
Mini Wireless Alarm Door Stop Alarm 120dB Great for Home Wedge Shaped Stopper Alert Security System Block Blocking System
Aliexpress UK
It is a photoelectric smoke alarm device. Smoke Detector, 10-Year Smoke Alarm with Photoelectric Sensor and Built-in 5 Year battery. Smoke Detector Battery (Include). Install the mounting bracket of the smoke detector on the ceiling.
eBay
WiFi or Zigbee Water Leak Sensor Tuya Alarm Flood Leak Detector Smart Home Life APP Water Alert Overflow Alarm Security System
Aliexpress UK
Product life span: 10 year. Battery life: 2 x 1.5 V AA (replaceable battery Included) replaceable battery Included. Sounds a loud 85 dB alarm. Optical smoke sensing technology detects slow smouldering fire.
eBay
Ewelink Zigbee 3.0 Water Sensor Alarm Water Leak Detector Flood Alert Overflow Security Alarm System Works With Zigbee Hub Z2M
Aliexpress UK
The units run out 2032.
eBay
WiFi/Zigbee Water Sensor Tuya Leakage Alarm Flood Leak Detector Smart Home Life APP Water Alert Overflow Alarm Security System
Aliexpress UK
The units run outOct.
eBay
Wireless Door Window Vibration Sensor Alarm 125dB Glass Breakage Anti-theft Sensor Remote Alarm For Home Safety Protection
Aliexpress UK
All Alarms Sound As One: All Link+ Pro alarms connected to the base station will sound together if any one of them is triggered, ensuring everyone hears the alarm and can react quickly; the Link+ Pro series includes SC07-MR/XP0A-MR combination alarm, XS01-M/XS0B-MR smoke alarm, XC01-M carbon monoxide alarm, and XH02-M heat alarm.
eBay
KERUI WiFi/4G GSM Burglar Alarm with 7 Inch Large IPS Touch Screen for Home Security Alarm System with Siren Motion Sensor G70
Aliexpress UK
UK Electric Fence Energiser 12V 230V Corded 2J Output 10KM Range Fencing Kit. Electric Fence Energiser 12V 1.5-2J 12km 7.5 Miles Range LCD Display AC Battery. Alarm sound pressure: 80db/1m. Alarm current: ≤ 160mA.
eBay
Door and Window Alarm Security Wireless Home Window Door Anti-theft Security Alarm System Magnetic Sensor
Aliexpress UK