[Multi-interface selection] Meet various interface requirements, built-in digital-to-analog chip, easily support all kinds of audio equipment, AUX/RCA/digital optical (Optical)/coaxial (Coaxial) interface plug and play. [NFC pairing] Built-in Bluetooth sensor chip, the mobile phone close to the NFC sensor area connected in seconds,Compatible with all kinds of mobile phones, tap connect and pair to reduce the tedious operation of manually connecting to Bluetooth. [Convenient control] Equipped with multi-function keys,-key switch mode, reduce tedious operation, support play/pause/cut song/volume/mode switch/signal source switch and other functions. [LED display] Innovatively equipped with LED display, Bluetooth receiving and transmitting/FM status is clearly visible Light orange light, soft and not dazzling, obtained the national design patent. [Compatible and universal] Limited equipment upgrades Bluetooth, supports all kinds of old TVs, computers connect Bluetooth headsets in seconds.