SPECIFICATIONSExternal Power Input: DC5V/1AStandby Current: <1 mASound Level:  >100dBWireless Reception Range: >100m(open space)Wireless Frequency: 433MHzSolar Panel output 5.0VAlarm Current: <150mAWireless Coding: EV1527/2262 supportedWater Resistance: IP65Back Battery: 3.7V 1000mA Lithium BatteryWorking Temperature: -20℃ – 55℃Working Humidity: 40%-80%(no condensing)Form Factor: 164.3*124.3*59mm