Specification: Origin: Mainland China Package: Yes Model Number: Wireless Adapter Input voltage: DC 5V Interface type: AUX+RCA Bluetooth-Compatible: 5.3 Bluetooth-Compatible protocol: A2DP AVRCP Transmission distance: obstacle free 10 meters/32.8ft Music format: MP3/APE/FLAC/WAV/WMA Product size: 83 * 56 * 25mm/3.27*2.2*0.98inch Packaging size: 140 * 90 * 28mm/5.51*3.54*1.1inch Gross weight: 50g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Audio Receiver 1 x Power Supply Line 1 x AUX Audio Cable 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.