Features: 1. Compact and mini-sized design, easy to carry. 2. Built in microphone, supports handsfree function. 3. It allows you to enjoy music and sound on your multimedia player. 4. Transmission distance up to 10M, strong signal. 5. Easy to control, plug and play. Specification: Size: about 5*1.8*0.8cm/1.97*0.71*0.31in Compatible profile: A2DP, AVRCP Receiver distance: about 10m (no lock) For Bluetooth Version: 5.0 Color: Black, Red, Blue, Green, Pink(optional) Package List: 1 * Receiver Instructions for Use: 1. Insert the receiver into the speaker's USB interface. 2. Open the Bluetooth enabled mobile phone (or computer), and search the surrounding bluetooth devices to find a device called BT-DONGLE and then its' pairing code is 0000(if asked), after the pairing is successful, the led light will slow down. 3. Then you can select the music via Bluetooth from a cell phone or computer, a great music will play from speaker. 1、Compact and mini-sized design, easy to carry. 2、Built in microphone, supports handsfree function. 3、It allows you to enjoy music and sound on your multimedia player. 4、Transmission distance up to 10M, strong signal. 5、Easy to control, plug and play.