The FireAngel kitchen heat alarm uses thermistor technology to detect rapid temperature changes quickly. It reacts to heat rather than smoke, making it ideal for kitchens where cooking fumes often trigger false alarms. The loud 85 dB alarm makes sure everyone at home hears it straight away. Good to know - With Sleep Easy mode, low-battery warnings are limited overnight - Smart Silence helps stop false alarms without fully switching it off - The large test button makes it easy to check or hush the alarm - The alarm has a 10-year sealed battery