Description: Bluetooth receiving & digital-to-analog conversion, U Disk Play 3IN1 HIFI sound quality for ears to enjoy, APTX-HD HD decoding restores CD-level high-fidelity sound quality Through this product,digital audio can be converted into analog audio signals.The music in the mobile phone can be wirelessly transmitted to be the audio equipment. Simple to operate and can freely receive and transmit most of audio. It’s suitable for TV,recreational machine,CD player ,MP3,etc.It perfectly solves the limitation of audio equipment and expands the function of various audio equipment. Specification: Size: 71x59x25mm/2.8x2.3x1 inch Colour: Black Bluetooth Version: 5.0 Transmission Distance: 20m Optical input, U disk playback Coaxial input Package Includes: 1 Piece Converter 1 Piece Power supply 1 Piece 3.5mm Audio line 1 Piece AV Coaxial line 1 Piece User manual Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you！