Features: Small and exquisite design, easy to carry. Built-in microphone, support for hands-free function. Enables you to enjoy music and sound in a Bluetooth multimedia or music player wirelessly with a Bluetooth stereo headset. Supported configuration files: A2DP, AVRCP Receiving distance: about 10m Specification: Material: ABS Color: White Bluetooth: V2.1+EDR Supported configuration files: A2DP, AVRCP Receiving distance: about 10m Size: Approx. 6 * 2 * 0.8 cm/ 2.36 * 0.79 * 0.31 in Weight: Approx. 15.2 g Package list: 1 * USB BT Receiver Instructions for use: 1. Plug the receiver into the speaker's USB port. 2. Turn on the Bluetooth mobile phone (or computer), search for the surrounding Bluetooth device, and find the BT-MUSIC device with it. 3. Then you can select music playback from your phone or computer via Bluetooth. 1、Small and exquisite design, easy to carry. 2、Built-in microphone, support for hands-free function. 3、Enables you to enjoy music and sound in a Bluetooth multimedia or music player wirelessly with a Bluetooth stereo headset. 4、Supported configuration files: A2DP, AVRCP 5、Receiving distance: about 10m