... 2) Battery powered 3)Electric magnetic carbon monoxide detector (co detector,co alram)1)MAINS POWERED ALARMSAC Input Supply Voltage: 110Vor 220V ... . 4.Audible Alarm Output :85dB at 1mOur company Sentek Electronics Co.,Ltd is specializing in designing,developing and manufacturing fire and secturity ... !Your visit or e-mail are welcomed ! carbon monoxide detector (co alarm) with CE