Usb 4.0 Bluetooth Dual Mode Dongle, Compatible With Bluetooth 2.1, 3.0, 4.0 Specifications. Integrated Low-Power Mcu, Rf Transceiver, Baseband, Modem, Usb, Uart, Pcm/I2s, Saradc And 24 Gpios With The Barry Bluelett Protocol Stack To Provide Low-Cost, Low-Power, Flexible And Powerful Bluetooth Application.
eBay