Features: 1. USB Bluetooth 4.0 music receiver for USB flash drive,Play music phone via audio cable to auxiliary port. 2. Long distance to play your favorite songs in your device through a Bluetooth connection. 3. transform your speakers into a fashionable wireless Bluetooth speaker. 4. Insert the Bluetooth dog into the player USB slot with a USB audio profile. 5. Turn on the player and the dongle's red LED will flash. 6. Open the Bluetooth player and search for ID: BT-173, match. 7. If the pairing is successful, the content of the Bluetooth player flows to the USB audio player. 8. Mini, lightweight and portable design. Specification: Condition: 100% brand new Material:ABS Weight: Approx.447g Power: USB 5V power supply Support Bluetooth 4.0 + EDR Support A2DP, AVRCP, AVDTP, HFP and HSP Output: USB port 3.5mm audio interface 5Receiving distance: not less than 10m Color:white,black Size:6 * 2 * 1cm/2.36*0.78*0.39inch(approx) Package include: 1* Bluetooth receiver 1* audio cable Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1、1.USB Bluetooth 4.0 music receiver for USB flash drive,Play music phone via audio cable to auxiliary port. 2、2.Long distance to play your favorite songs in your device through a Bluetooth connection. 3、3.transform your speakers into a fashionable wireless Bluetooth speaker. 4、4.Insert the Bluetooth dog into the player USB slot with a USB audio profile. 5、5.Turn on the player and the dongle's red LED will flash.