The Hispec HSA/PH/10 Multi-Sensor Smoke and Heat Alarm delivers reliable home protection with advanced fire detection technology. Powered by a tamperproof 10-year sealed lithium battery, it combines both optical and thermistor sensors to quickly identify slow-smouldering fires and fast-flaming heat sources. This reduces false alarms while giving you accurate, early warning when it matters most. With no wiring required, installation is quick and simple making it ideal for hallways, bedrooms, landings, living rooms and dining areas. Built with an insect-proof design and easy test/hush button, this alarm provides dependable safety and long-lasting peace of mind. Standalone 10-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test/Hush Button High Quality Optical & Thermistor Sensors For Enhanced Fire Detection Low Battery Warning Insect-Proof Design to Help Prevent False Alarms Easy Installation - No Wiring Required Standalone 10-Year Sealed Tamperproof Lithium Integr...