Features: 1.100 percent brand new and high quality. 2. Compact and mini-sized design, easy to take along with. 3. Built-in microphone, supports hands-free function. 4. Enable you to enjoy music and voice in the Bluetooth-enabled multimedia or music player wirelessly with a companion Bluetooth Stereo headset. 5. Bluetooth version: 5.0 Specifications: Size: about 6cm x 2cm x 0.8cm Supported profiles: A2DP, AVRCP The receiver distance: about 10m (without Block) Instructions for Use: 1. Insert the receiver into the speaker or '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 or ' 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 the speaker. Package Included: 1 x USB Bluetooth Music Receiver