CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light. ENHANCED CO SENSING: With increased CO sensing capabilities, the alarm’s high sensitivity mode will activate if it predicts CO levels will rise to or above 180 ppm, providing a quicker alert. BATTERIES INCLUDED: Each CO monitor is fitted with 2 x 1 year replaceable AA batteries. A flashing amber '!' and an audible beep will alert you when the batteries need replacing. ALARM MEMORY: Your device will notify you of a CO alarm in your absence. If not silenced, the alarm will continue to sound until CO levels are safe. The red ‘CO’ light will continue flashing as a visual indication of a previous activation. TRAVEL CARBON MONOXIDE DETECTOR: Measuring 119 x 62 x 38 mm, this compact, free standing device is travel-friendly and provides protection wherever you go. It also includes an integrated mounting bracket and screws for easy wall mounting., Weight: 0.28219169536 pounds, Manufacturer: FireAngel