USB Bluetooth Function • Support Bluetooth 4.0 + EDR Agreement. • Support A2DP, AVRCP, HFP and HSP. • 8-10 mete working distance. How To Use • Plug the Bluetooth Dongle into the USB socket of the device w / th USB Audio Prof / te. • Turn on the audio device, the blue LED of the Dongle shall be ftash / ng. • Turn on the Bluetooth player, search for 1D BT DONGLE, then match. ff syccessfully paired, the content in Betooth player shall stream throughto the USB audio device.