2 Pack Photoelectric Smoke and Carbon Monoxide Detector,9V Battery Operated Combination Fire Alarm and CO Detector

This combination smoke/CO carbon alarm features an 85dB horn when detected. Meets NFPA 72 standards Smoke and Carbon Monoxide Alarm, Electrochemical, Audible Alert 85dB @ 10 ft., Horn,Reset Button, Hush Button Yes, Locking Pin Yes, Operating Temp. 40 Degrees to 100 Degrees F, Standards UL, Includes Mounting Anchors and Screws Features: * Battery low voltage tips *Automatic reset * Sound and light alarm * SMT industry, strong stability * MCU automatic processing technology to improve product stability Technical Parameters Working power: 9V battery?included? Quiescent current: <8uA Alarm current: <35mA Sensitivity: 2.06% / ft 1.3 Alarm sound pressure: ? 85dB / 3m Department Operating temperature: -10 ? ~ +50 ? Relative humidity: ? 95% RH Dimensions: ?105 * 38mm Executive Standard: GB4715-2005; En14604; UL217 Coverage Area: When the space height is 6m-12m, the protective area of one detector is 80m2 for the general protection site and 60m2 for the space height of 6m or less.