CC2500BD2 wireless module (is set FSK / ASK / OOK / MSK. Modulation in one of the transceiver modules working at the 2.4GHz ISM / SRD band-free license to use, using TI's CC2500 multi-channel RF transceiver is .CC2500 Ultra-low-power wireless applications in the industry and minimize system cost, multi-channel wireless products, with a strong digital processing features, so using only a low-cost MCU can build a high-performance radio frequency systems, including many useful digital features , such as an entire packet handling, FIFO buffers, clear channel assessment, and wireless wake-up, etc., can be widely used in consumer electronics products (such as wireless keyboards, mice, game controllers), wireless audio transmission (such as wireless microphones, wireless headsets, Wireless speakers) and other properties and characteristics: (1) Operating voltage: 1.8V ~ 3.6V, recommended near 3.6V, but can not exceed 3.6V (2) 2400-2483.5 MHz in ISM and SRD band, license-free use (3) maximum operating speed 500kbps, support 2-FSK, GFSK and MSK modulation (4) High receiver sensitivity (under 1.2kbps -110dBm, under 10kbps -101dBm, 250kbps at -90dBm, 1% packet error rate) (5) Built-in hardware CRC error detection and multipoint communication address control (6) low power consumption: TX: at 0dBm to 21.2mA RX: at 250kbps is 13.3mA; (7) Programmable output power, maximum output power 0dBm, the minimum -10dBm, the data rate can vary between 1.2kbps to 500kbps. (8) to support low power electromagnetic activation function, external interrupts, external interrupt or RTC wake-up system (9) to support automatic cleaning before transmission channel access (CCA ), that carrier sensing system (10) fast frequency variation suitable synthesizer frequency hopping system brings (11) module can be software set address, software programming is very convenient (12) Standard DIP pitch interfaces for embedded applications (13 ) Separate 64-byte RX and TX data FIFO (14) Few external components, high reliability (15) module visible straight line communication distance 20 m -80 m (16) Module size 21mm * 12mm (PCB onboard antenna) CC2500BD2 module Typical applications: ◆ access control, attendance, logistics ◆ wireless game controller; ◆ wireless keyboard / mouse; ◆ wireless headset / speaker / microphone ◆ automatic meter reading; ◆ radio; ◆ alarm and security systems; ◆ family and building automation. ◆ Sports and Leisure Equipment