Work Frequency: 2.4GHz-2.5GHz( Factory settings) Work mode: Active Transmit power: Less 1mW 0dBm ( Factory settings) Built-in battery: 3V( 1 CR2450) Static ( standby) Operating Current: < 1uA Maximum operating current ( transmission signal) : 2000 pcs at the same time Working temp: -25 ^ 70 Storage Temp: -40 ^ 85 Humidity: Less 95% Dimension: 35mm 10mm