Specification: 65 mm * 65 mm * 32 mm Repeater： for ASK 315 and 433 Mhz signal, IR signal Work with host in: GFSK 433 MHz Control: Android 4.3/IOS 7.0 or above Appearance material: PC Power supply: no. 5 battery * 3, battery duration 6-9 months Operating temperature: 0° to 40° C Relative humidity: 10% to 90% noncondensing Communication mode: built-in antenna Support host: Thinker, Thinker OP