... USB, UART, SPI, PCM interface Bluetooth Profiles: HFP, HSP, A2DP 100M SPP Data transfer Bluetooth Module WKBT0221ARz Fully Qualified Bluetooth v3.0 ... /2M/3MbpsReceive SensitivityTyp.-78dBmMaximum Output Power+4dBm(Class 2)Operating Voltage3.0V~3.6VOperating Temperature0~+70°CAntenna ... Impedance50Package Size10.5*10.5*2.2 (mm)UART InterfaceTX,RX, RTS, CTS(9600bps~1 ...