2-in-1 alarm that provides double the protection with a single installation to protect against carbon monoxide and natural gas;120-volt AC/DC hardwired alarm with backup battery is suitable for houses, apartments and mobile homes;Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall;Features a quick activation pull-tab and a front-loading battery drawer for replacement without removing the alarm from the bracket;Comes with a 7 year limited warranty

• USI Electric MCN108 Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup
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USI Electric MCN108 Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery BackupUniversal Security Instruments