1.RECEIVE/TRANSMIT 2-IN-1:Smart compatible with a wide range of audio devices. 2.Bluetooth 5.3: 5.3 Chip+ Decoding,Lossless stereo with adjustable .stronger compatibility and stability. 3.Multi-ports:Support using U-disk TF-Card NFC Coaxial 3.5MM AUX. 4.Microphone:Support microphone singing,professional karaoke chip,anti-howling. 5.NFC:Upgrade NFC one-touch pairing ,bluetooth connection for drive-free mobile phones. 6.IR Remote control:Upgrade the wireless IR remote control,exclusive custom remote control operation. 7.Antenna:With external antenna,enhance signal, can barrier-free transmission distance. 8.No Delay, lossless decoding technology, enjoy HIFI sound quality. 9. 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. 10.Receiver mode:For car kit wired speaker home stereo amplifier stereo Projector/etc 11.Transmitter Mode For: TV/PC/Projector/Power amplifier/TV Box /Bluetooth Headphone/Earphone/Bluetooth Speaker ... Product Specifications: Product Name:Multi-functional Bluetooth audio adapter Interface Type: AUX//COA/USB/TF/6.5mm Mic Transport Distance:About:10-30M Bluetooth Version:V5.3 Support Protocal:A2DP/AVRCP//OPP/etc Singing Function:Built-in 6.5mm Microphone interface Charging Time:about 1.5hours File Form:MP3/WAV/WMA/APE Core Functions: Bluetooth Audio Receiver+Transmitter+NFC+U-Disk Playback+6.5MM Microphone Interface lnput(For KTV Karaoke Singing)+IR Remote Control Colour:Black Material:plastic Package Contents: 1 x Bluetooth Transmitter Receiver 1 x USB Cable 1 x Audio Cable 1 x Cable 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.