AO-H1 Gas alarm is a kind of plug in household gas alarm designed to detect the concentration of combustible and toxic gases or vapors using high quality air-sensitive component and manufactured with advanced technology. It provides visual and audible signals when the gas concentration reaches the presetting range, and reminds you to take prompt favorable action.
1. In pre - heating status: the indicator light and the ring alarm light keeps green for about 1 minute.
2. In normal status: the ring alarm light keeps flashing.
3. In alarm status: the ring alarm turns red, and keeps sending out "beep, beep, beep" alarm sound.