Feature: Compact design, easy to carry. Built-in microphone to support hands-free function. With Bluetooth-compatible stereo headset, you can enjoy music and voice wirelessly through Bluetooth-compatible multimedia or music player. Specification: Bluetooth-compatible Version: 5.0 Colour: Black/Red/Green/Blue/Purple Receiving distance: 10m Interface: USB Supported configuration files: A2DP, AVRCP Size: 6cm x 2cm x 0.8cm/2.36x0.78x0.31'' Weight: 20g Pairing Method: Turn on the Bluetooth-compatible mobile phone (or computer), search for the Bluetooth-compatible devices around, find the device named BT-DONGLE, and then pair the code to 0000 (if required). When the pairing is successful, the LED indicator will light up. Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 X USB Bluetooth-compatible Receiver Audio Wireless Adapter