Used by Fire and Rescue Services, the HT-630R Heat Alarm by FireAngel is sure to bring peace of mind to your home. The HT-630R is powered by a sealed, tamper-proof 10-year battery that doesn't need to be replaced throughout the life of the alarm. Ideal for use in kitchens, garages and lofts, this smart system uses Thermistek™ heat sensing technology to provide a quick reaction to a rapid rise in temperature. Is also comes equipped with a large test and silence button that's easily accessible for added convenience.