Convenient to use: Bluetooth Compatible 5.3 audio receiver, USB music player, wired audio second to Bluetooth Compatible audio. Audio receiver: Upgrade Bluetooth Compatible audio, and audio without Bluetooth Compatible function can also achieve wireless playback. Multipurpose: Insert into the car's AUX port, connect wirelessly to listen to music using Bluetooth Compatible on your phone, and make the car's audio system high. Product Name: Bluetooth 5.3 Audio Receiver Bluetooth Version: Bluetooth V5.3 Bluetooth Protocol: A2DP AVRCP Input Voltage: DC 5V Interface type: AUX+ Product size: 83x56x25mm Transmission distance: barrier-free 10 meters Music format: MP3/APE/FLAC/WAV/WMA Product function: Plug and play, turning wired speakers into Bluetooth speakers in seconds Colour:Black Material:ABS Package Contents: 1 x Bluetooth Receiver 1 Supply Line 1 x AUX Audio Cable 1 x Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.