230V mains-powered heat alarm with tamper proof rechargeable 10-year lithium battery back-up. Fixed temperature thermistor sensor activates at 60°C for optimised fire detection, with fewer false alarms. Can be interlinked with up to a total of 20 Hispec mains-powered fire safety devices, including smoke, heat and CO alarms (when one alarm sounds, all interlinked alarms will also activate). Suitable for use in kitchens, garages and lofts. Supplied with fixings. Interlinked when Hardwired 220-240V AC/DC Mains-Powered with Battery Backup 10-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test/Hush Button Interlinked when Hardwired (20 Alarms can be Interlinked in 150m) Fast Fix Base Supplied for Quick & Easy Wiring Silence Nuisance Alarms Low Battery Warning 230V AC Mains powered with Battery Back-Up Interlinked when Hardwired 220-240V AC/DC Mains-Powered with Battery Backup 10-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test/Hush Button Inte...