Description: Loud 85 decible alarm Permanent carbon monoxide sensor. Powered by one 9 V battery ( size: 6F 22 or Alkaline 6LR61). The alarm sound pattern is pulsed the alarm beeps. This continues until the CO eliminated. The red LED will flash... - Update: 2007-01-05

Description: Widely used for room, hall, kitchen, party, no smoking place, Hotel, Factorya?|..etc. Alarm mode: while smoke density reach the limited, it gives off alarm warning as well as sending wireless signal to alarm panel, High sensitivi... - Update: 2007-01-05