The Kidde® HD135F is a 120 VAC wire in heat alarm that responds to temperature rather than smoke. The alarm will sound if temperatures rise above 135 deg F. The Kidde® HD135F is interconnectable. The interconnect system must not exceed the NFPA limit of 18 initiating devices (smoke, heat, CO, etc) interconnected, it is still possible to interconnect 6 strobe lights and or relay modules.

Firex® by Kidde® Heat Detector Alarm, Wire-In, 9 VDC Battery Power Source, 10 ft Detection, Heat Sensor, Alarm: Audio, 5 to 95 % Humidity, LED Display, -20 to 100 deg F Operating, White, 5 in Dia x 2 in D Dimensions

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• Test button tests units electronic circuitry, horn and battery function
• 9 VDC battery backup provides continuous protection even during power outages
• Red LED flashes every 30 to 40 s to indicate proper operation
• Low battery indicator alerts user in the event of a low or missing battery
• Quick connect power harness makes installation fast and easy
• Interconnects with up to 24 Kidde® devices of which 18 can be initiating
• The Kidde HD135F 120 VAC wire in heat alarm gives you and your family an early warning to dangerous temperatures of 135 deg F or more
• This unit also includes a tamper-resistant pin that helps to deter thief and tampering
• This unit can be used as a single station unit or it can be interconnected to up to 24 Kidde devices in a multiple station arrangement