Specifications Power supply 5V 1ABattery CR123AStandby current 18uABattery life 2 years 20 times dayWireless channel 11 26 2 4GHzWireless protocol ThreadWireless distance 45MWorking temperature 0℃ 40℃Working humidity 20 85 Product size 82mm x27mm x23mmDeputy body 50mm x 13mmx16mmBattery AA 1 not included please purchase additional Package Includes 1 x Door Window Sensor1 x USB Power Cable