230V mains-powered smoke and heat alarm with tamper proof rechargeable 10-year lithium battery back-up. High quality combination of an optical and thermistor sensor for fire detection with few 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 hallways, landings, living rooms, dining rooms and bedrooms. Supplied with fixings. Interlinked when Hardwired 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 for Quick & Easy Wiring Silence Nuisance Alarms Test Button Low Battery Warning 230V AC Mains powered with Battery Back-Up Interlinked when Hardwired 10-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test/Hush Button Interlinked when Hardwired (20 Alarms can be Interlinked in 150...