Features: 1. Bluetooth 5.1 audio receiver, NFC a touch to connect. 2. Dual audio interface, multiple interface options, to meet the needs of various types of equipment. 3. Built-in Bluetooth induction chip, cell phones near the second connection, support for cell phones with NFC function tablet, to avoid tedious manual connection. 4. Support TF card playback, plug-and-play, driver-free installatio. 5. Automatic pairing, second connection, with memory function, after the first pairing, the subsequent power on can automatically connect, no need to re-pair. 6. Built-in signal gain amplifier, room connection without dead ends, 10 meters transmission sound quality without delay, signal stability without lag. Specifications. Name: NFC Bluetooth audio receiver Material: PC + ABS Bluetooth: Bluetooth 5.1 Product size: 95X65x21mm Frequency: 2.4GHz-2.48GHz Charging voltage: DC 5V Battery capacity: 3.7V/500mAh battery Transmission distance: 10-30 meters without obstacles Music format: MP3/APE/FLACWAV/WMA Interface type: AUX/RCA/U disk TF card/MIC interface Function: Bluetooth receiver/NFC/U disk/TF/Remote Control Package includes: 1* Bluetooth Receiver Adapter 1* Remote Control 1* Type-C Cable 1* 3.5mm Audio Cable 1* RCA Audio Cable