1. Convenient to use: USB music player, wired audio second to Bluetooth Compatible audio. 2. 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. 3. Portable: Vehicle power supply, built-in common ground interference processing circuit, ensuring stable sound quality output. 4. Newly upgraded: USB-based car Bluetooth receiver, compatible with both car and stereo systems, no need for cables or charging, powered by the car for long-lasting battery life. 5. USB car adapter & Bluetooth receiver: supports for /-LL/-HD, /AAC/FLAC, and Mountain View. Color: Black Material: Plastic+Metal Package Contents: 1 x Bluetooth Receiver 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.