Module basic characteristics: (1) 2.4Ghz ISM band license-free worldwide open use (2) FSK modulation it has a better sensitivity, GFSK gives better frequency modulation rate (3) have 250Kbps 1Mbps or 2Mbps air data transfer rate (4) Programmable output power: -35, -25, -15, -5, 0, 5 dBm (5) at 0 dBm output power, power transmission mode consumes 14mA; (6 ) at 1Mbps data transfer rate, power reception mode consumes 21mA (7) allows +/- 60ppm 16 MHz crystal (8) having a variable length payload of three, can be 1 to 32-byte length. Or the level of the variable payload length, the length 1-255 bytes (9) automatic data processing (10) is adapted to 1: 6 6 star network data channel, you can receive data simultaneously six different frequency channels Pack (11) power supply is 1.9V to 3.6V (12) in the POWERDOWN mode 3uA DC current in standby-I mode of 410uA DC current (13) with a maximum clock rate of 8Mbps MCU 4-pin SPI Interface (14) Module size: 16.9 * 13mm Usage: vehicle monitoring, remote control, telemetry, small wireless network, wireless access control system, residential short-range paging, industrial data acquisition systems, wireless tags, identification, non-contact RF smart card, small wireless data terminals, security fire protection systems, wireless remote control systems, bio-signal acquisition, hydrological and meteorological monitoring, robot control, wireless 232 data communications, wireless digital audio, digital image transmission