230V mains-powered carbon monoxide alarm with 9V battery back-up. High quality electrochemical sensor to detect the presence of carbon monoxide. Alarm will activate at 50ppm within 60-90 minutes, 100ppm within 10-40 minutes and 300ppm within 3 minutes. 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 rooms containing a fuel burning appliance. Supplied with 9V replaceable battery back-up and fixings. Interlinked when Hardwired 220 - 240V AC/DC Mains-Powered with Battery Backup 9V Battery Supplied 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 9V Battery Supplied 85d...