Heat with hush & mounting plate, Ideal for protecting kitchens and garages and other areas subject to false alarms , Ixed temperature fast response thermistor sensor range 54 – 62C, Alkaline battery supplied already connected to reduce installation errors (does not draw power until alarm is fitted to the mounting plate), Hush button for false alarm control, Interconnects with other Ei mains powered smoke and heat alarms, Separate mains and wa