Adopt Bluetooth 5.3 chip design, stronger compatibility and stability. Built-in 6.5mm high-definition microphone, which supports microphone access for singing,suitable for karaoke, lossless transmission, live theater music effect, family KTV karaoke more carefree and happy. Support U-Disk playback,Enjoy lossless sound quality experience, Plug and play, lossless transmission, built-in HD audio decoder, easy to read audio format files, support MP3/APE/FLAC/WMA/WAV format. Support IR Remote Control, 5-10M barrier-free wireless control,Supports volume adjustment/signal switching/song switching, making the operation more convenient and faster. (NOT SUPPORT POWER ON) With external antenna,enhance signal, can barrier-free transmission distance. No Delay, lossless decoding technology, enjoy HIFI sound quality. Powered By USB Charging (No built-in battery ). Product Name: Multi-Function Bluetooth Audio Receiver Adapter Audio lnput Interface: Coaxial/6.5MM MIC/USB U-Disk/3.5MM AUX Output Interface: 3.5MM AUX/R-L Bluetooth Protocol Support: A2DP/AVRCP/HFP/ Frequency Operation Mode: key switching, Knob adjustment, remote control USB U-Disk Support: WMA/WAV/FLAC/APE/MP3, etc Bluetooth Decoding: Bluetooth Version: V5.3 Bluetooth Distance: 15 meters Core Functions: Bluetooth Audio Receiver+U-Disk Playback+6.5MM Microphone Interface lnput(For KTV Karaoke Singing)+IR Remote Control Colour:Black Material:Aluminum Alloy Package Contents: 1x T500 Bluetooth Audio Receiver Adapter 1x Remote Control(With battery) 1x 3.5MM Audio Cable 1x Audio Cable 1x Coaxial Audio Cable 1x Typc-C Power Cable 1x English User manual 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.