Hardwired carbon monoxide alarm with 9V battery back-up meets codes where CO alarms are required for new construction.Electrochemical Carbon Monoxide Sensor - the most accurate sensor available as compared to other sensing technologiesSingle button test/silence9V Alkaline Battery BackupLatching arm indicator - remembers which unit initiated an alarmTwo Silence Features - can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarmIntelligent Sensing TechnologyTM helps reduce the number of nuisance alarmsDust coverEnd of life signal provides audible notification when alarm needs to be replaced7-Years Limited Warranty Item Specs:Alarm Dimensions: 5.4" dia x 1.9"HWeight: 6.4 ozOperating Voltage: 120V AC 60Hz w/ 9V battery backupOperating Current: .09 amps (standby/alarm)Temperature Range: 40°F (4°C) to 100°F (38°C)Humidity Range: 10% to 95% relative humidity (RH)Audio Alarm: 85dB at 10 feetTest/Silence: Electronically simulates carbon monoxide condition, causing the unit to alarm Press and hold test/silence buttonAlarm Reset: Automatic when CO clearsInterconnections: Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details.CO Sensor: Electrochemical
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