Description/Features: Rich interface extensions to meet the needs of different devices Wired audio/amplifier upgrade experience Bluetooth function Wireless infrared remote control 5-10M fast and barrier free Car speaker connection enjoying sound quality Support USB playback and enjoy lossless sound quality experience Specifications: Bluetooth version: 5.3 Input power supply: DC 5V Transmission distance: 15M Power supply : Type-C interface Audio input interface: Bluetooth/AUX/coaxial/USB/MIC Audio output interface: R-L Lotus/AUX Battery: Button battery(with) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: Aluminum alloy colour: Black Package Contents: 1 x Receiver 1 x Remote Control 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.