Work Frequency: 2.4GHz-2.5GHz( Default Value) Work mode: Active Transmit power: Less than 1mW 0dBm ( Default Value) Build-in Battery: Built-in 3 unit CR3032 button batteries Quiescent current: < 1uA The maximum operating current: 200pcs Working temp: -25 ^ 70 Storage Temp: -40 ^ 85 Humidity: Less than 95% Dimension: 86.0mm 54.0mm 4.5mm