Installation Height: 1.8 - 2.2M ● Built in 2pcs of "3V * AAA" battery, attention: it's non-chargeable battery ● Standby Current: <25uA ● Working Current: <15mA ● Detecting Range: 8-12Mts/90degree ● Wireless transmitter range: >80M (In the open air) 1 ● Wireless Transmission: Frequency 433MHz RF Communication ● Detecting Angle: 110° wide angle