Door-stopper alarm: High sensibility. Give an alarm The door-stopper alarm: High sensibilityCan be used for vibratingProtect people against prizing and stealinga special design, modern and fashion, small and artistic, Technical Parameter:Power supply: DC 1.5V/AAAlarm decibel: ≥85db/3mTemperature: -10~+40Humidity: <95%Size: 150*45*40mm