Wireless Door Window Gap Magnet Sensor
Product Features:Wireless, Easy InstallationDimensions: 71 X 36 X 15 mmWeight: 50 gramsColor: WhiteTechnical details:Transmission distance: 250 feet (open field)Gap for triggered: > 15-20mmPower supply: DC12V battery (included)Operating current: 8~15mAStandby Current:3uAWorking frequency: 433Mhz