... AC 110V-240V /DC9V 115dB sound Description:1.GAS detector,Smoke detector,CO Detector,Scarbon monoxide detector,sending wireless signal alarm independently.2.while ... light on, at the same time the product start to detector, when detect gas or smoke in air reach a ... less than 95%RHDetecting area: 20 square meter Detector Gas Density:2000PPM±30%Detector Smoke Density:1000PPM±30% Packing:100pcs/Carton Size ...