The USB bluetooth music receiver neither extension line, also no need pull wire, don& 39;t need 3.5mm headset line to transfer and output.Through wireless bluetooth music transmission to U disk read home audio system, then you can enjoy it.Bluetooth music receiver with bluetooth V2.1 provides the reliable and high-quality sound.Compact and mini-sized design, easy to take along with.Built in microphone, supports handsfree function.Enable you to enjoy music and voice in the bluetooth-enabled multimedia or music player wirelessly with a companion bluetooth-compatible stereo headset.Applicable Instructions:1, Insert the speaker& 39;s USB port can become bluetooth speaker instantly.2, Suitable for all of the U disk speaker jack.3, bluetooth-compatible audio playback, answer the phone function.4, Key Functions: Volume Down, Next, Volume Plus, Play, Pause to Answer the Call, Hang up the PhoneType: USB bluetooth-compatible Audio ReceiverBluetooth V2.1Color: BlueThe Receiver Distance: about 10m (without Block)Features: Useful, Portable, Plug and Play, Handsfree, Multi-functionSize: 6cm x 2cm x 0.8cm/2.36" x 0.79" x 0.31" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x USB bluetooth-compatible Audio Receiver