Kidde Firex KF3 ( Mains/Battery Heat Alarm

Kidde Firex KF30 (Mains/Battery Heat alarm) Kidde Firex 2x KF20 Optical Smoke & 1x KF30 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up Kidde Firex KF30 Mains Battery Heat Alarm Kitchen Garage Kidde Firex KF3 ( Mains/Battery Heat Alarm Interconnectable Heat Alarm The Firex KF30 heat alarm with battery backup is perfect for kitchens (replacing Kidde 4899). It alarms at 57°C, avoiding nuisance alerts from burnt toast or steam. In stock now 85 decibel sounder (@3m);Can be interconnected with up to 24 other alarms in this range. Heat Alarms Detectors Mains powered heat alarm with 9 volt battery back up;Normally used in kitchens, garages, boiler rooms or unconverted loft spaces;Hush function allows unwanted alarms to be silenced.