Smoke alarm 1) Adopt special control CMOS chip gathering high compositive degree 2)Tiny power consumption, battery as power s AC Smok alarm with 9v battery backupSpecifications:Power source: DC9V, AC110V/AC220V, DC9V/AC110V/AC220VStatic current: <10uAAlarm current: <10mA;Alarm sound: >85dB (3M)Ambient temperature: -10~40°CAmbient humidity: ≤95% (40±2°C)Low battery Alarm: 6V±0.5VCE CERT.