... factory, mainly produce alarm and sensors. Product introduction:Adopting wireless GSM network and advanced digital technology, it is combined ... home, office building, public place. Absolutely wireless solution control,without phone cable, avoid phone trunk cut-off, easy-to-operated and ... 110 ACV ~240 AC , input 9~12DCV/1500mA 3. Wireless receiving distance 160~200m (outdoor), indoor: 30~80m(indoor) ...