... , school, factory, museum, Hospital.c). Widely used for bank, electric power Dept. Oil Dept,Railway Dept. financial Dept. Police Dept ... voltage: input: 110 VAC or 240VAC , Output :9~12VDC2. Siren index: 110~120 dB (Test distance: 300mm, Surrounding noise: ≤65db ... color. Size:100mm*95Simple pack: One wireless horn siren (or wireless flashing siren selectable), one adaptor, one wireless door sensor, one ...