Feature:Integrated low-power MCU, RF transceiver, baseband, modem, USB, UART, PCM/I2S, SARADC and 24 GPIOs with Barry Bluelett stack provide low cost, low power, flexible and robust Bluetooth-compatible applications. Description:Product Name: V5.1 Bluetooth-compatible Adapter;Interface: USB 2.0;Transmiion rate: maximum 24Mbps;Bluetooth-compatible version: Bluetooth-compatible V5.1;Frequency band: 2.400-2.480GHz;Colour: Black;Low-power options: 1.2 to 3.6 VI/O;Compatible with Bluetooth-compatible: v1.2/2.0/2.1/3.0/4.0;Supported operating systems: compatible for Windows, Android, Linux, FRERTOS, ThreadX UITRON;Support software: compatible for Microsoft Bluetooth-compatible software, CSR, Bluez, Bluesol;Support application functions: HFP/HSP (hands-free phone/headphone) A2DP/AVRCP (stereo music) HID/HOGP (keyboard mouse). DUN/PAN (online), PBAPMA; PFTPSPP.GATT, etc.; Packing list:1 x Bluetooth-compatible Adapter1 x Packing BagNote:1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding.2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.3.If your computer system cannot be plugged in and used, you can consult us about Bluetooth drivers