Features: 1. Convenient to use: Bluetooth Compatible 5.3 audio receiver, USB music player, wired audio second to Bluetooth Compatible audio. 2. Interface type: Dual output interface design, 3.5+RCA dual audio port suitable for multiple devices. 3. Audio receiver: Upgrade Bluetooth-compatible audio, and audio without Bluetooth-compatible function can also achieve wireless playback. 4. 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. 5. Portable: TYPE-C 5V power supply, built-in common ground interference processing circuit, ensuring stable sound quality output. Specification: Model R20 Model Number: Wireless Adapter Interface: 3.5MM/AUX/RCA/USB Input voltage: DC 5V Plug and Play: Plug and Play External power supply: No external power supply Transmission rate: 10 (Mbps) Effective working radius: 100 (m) Bluetooth standard: 5.3 Operating frequency: 2400 (MHz) Music Format: MP3/APE/FLAC/WAV/WMA Product size: 83 * 56 * 25mm/3.27*2.2*0.98inch Bluetooth Compatible: 5.3 Bluetooth Compatible Protocol: A2DP AVRCP Package includes: 1 x Audio Receiver 1 x Power Supply Line 1 x AUX Audio Cable 1 x RCA Cable（optional） Note: Due to the different monitor and light effects, the actual color of the item might be slightly different from the color shown in the pictures. Thank you! Please allow a 1-2cm measuring deviation due to manual measurement.