The Bluetooth audio receiver adopts dual-output (USB/AUX) interface design, bringing you to enjoy the of wireless music. audio is instantly upgraded to Bluetooth audio, eliminating the need for complicated wiring. Mobile phone/computer Bluetooth wireless connection is more free and convenient. To connect the AUX interface device, you need to connect the USB. No need to install drivers Plug and play. Built-in enhanced antenna, no coverage, 10 transmission -free. Type: Bluetooth Adapter Bluetooth version: V5.3 Bluetooth protocol: A2DPP AVRCP Frequency range: 2.402GHz-2.480GHz Transmission mode input: USB+AUX Receive mode output: USB+AUX Working distance: about 10M Working voltage: DC-5V Colour:black Material:ABS Package Contents: 1 x Adapter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.