BRK Electronics First Alert CO250B 9V DC Battery Operated Tamper Resistant Electrochemical Carbon Monoxide (CO) Alarm

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9V Battery Electrochemical Carbon Monoxide Alarm with Silence. Electrochemical CO Sensor Silence Feature End of Life Signal provides audible notification alarms needs to be replace d Tamper Resistant Locking Pin 9V Battery Included 10-Years Limited Warranty Model # CO250B Weight 5.1 oz Dimension 4.25" dia x 1.6"H Operating Voltage 9V Battery Powered Temperature Range 40°F (4°C) to 100°F (38°C) Humidity Range 10% to 95% relative humidity (RH) Audio Alarm 85dB at 10 feet Test/Silence Electronically simulates carbon monoxide condition, causing the unit to alarm and silences unit. Alarm Reset Automatic when carbon monoxide clears CO Sensor Electrochemical Indicator Lights/Sounds DC Power: Intermittent red Light Listing Listed to UL 2034 Standard Show more