USB 5.0 Bluetooth dongle, also compatible with Bluetooth 2.1, 3.0, 4.0, 4.1 and 4.2. Integrated low-power MCU, RF transceiver, baseband, modem, USB, UART, PCM/I2S, SARADC and 24 GPIOs with the Barry Bluelett protocol stack to provide a low-cost, low-power, flexible and powerful Bluetooth application.