The Kidde FireX HD135F is a 120-Volt AC Wire In Heat Alarm that responds to temperature rather than smoke. The alarm will sound if temperatures rise above 135 degree F. The Kidde HD135 degree F is inter connectable. The interconnect system must not exceed the NFPA (National Fire Protection Association) limit of 18 initiating devices (Smoke, heat, CO, etc.) interconnected, it is still possible to interconnect 6 strobe lights and or relay modules. This unit includes a 5-year limited warranty and is UL Listed.

• Receive an instant alert when temperatures exceed 135 degree F
• Test button assures proper operation of the sensor's electronic circuitry, horn and battery function
• Interconnects with up to 24 Kidde devices (of which 18 can be initiating), including smoke and carbon monoxide alarms
• 9-Volt battery backup provides continuous protection even during power outages
• Red LED flashes every 30 - 40 seconds to indicate proper operation
• Quick-connect power harness for fast and easy installation
• Tamper-proof pin helps deter tampering and theft
• Replacement 9-Volt battery Kidde model 21025830
• UL/CSFM Ref. HD135F
• Not a smoke detector
• Compatible with Kidde, FireX, Code One and Sentinel products
• Kidde offers a full range of 120-Volt AC wire-in life safety products with interconnect capability to provide the most immediate and complete system available; when any 1 interconnected alarm is triggered, all interconnected alarms within the home sound an immediate warning
• UL/CSFM Ref. Kidde Part HD135