[2-IN-1 BLUETOOTH ADAPTER]: Support Bluetooth receiver (RX), Bluetooth transmitter (TX)Equipped with HD LED display, the working status and Bluetooth mode are clearly visible. With multi-function buttons, one-key switch mode, or play / pause music, easy operation. Built-in high definition microphone, support wire-less music listening, hands-free calling, navigation, you can drive more safely | [WIDE COMPATIBILITY]: Support NFC function, connect bluetooth when the cellphone is nearby (cellphone must have this function). As an audio bluetooth transmitter, it transforms non-bluetooth TV, PC, laptop, tablet etc. into bluetooth functions. Enjoy the wire-less tech life. Support 5-8m infrared remote control, easy control of multiple functions | [BLUETOOTH 5.0 HI-FI SOUND]: It has advanced Bluetooth V5.0 chip to ensure hi-fi stereo lossless Bluetooth audio signal for music streaming to AUX or RCA input speakers, car or home stereo. Support aptx Low Latency. Stronger compatibility and stability, wire-less range is more than 10m / 33feet | [MULTIPLE INTERFACE OPTIONS]: Built-in digital to analog chip, supports 3.5mm jack AUX, Cinch, digital optical, coaxial, USB (memory card), TF interface. Comes with AUX cable, RCA cable, USB charging cable, it can meet all your connection needs and match with various audio devices with bluetooth and non-bluetooth function | [RECHARGEABLE & EXCELLENT BATTERY LIFE]: Built-in with 500mAh battery that supports the receiver for non-stop streaming up to 8-10 hours, long standby time of 30 days. Can be used while charging. Enough for music and speakerphone on a long journey. Compliance with safety certification, longer service life | NOTE: When you find that you need to reset your device multiple times to connect instead of connecting automatically, you need to check if your other devices (like your phone) have Bluetooth turned off | Tips for pairing headphones: Long press the button of the headset charging compartment to make the indicator become milky white, pay attention to your mobile phone Bluetooth must be turned off at this time to avoid connecting back. Then open the Bluetooth adapter, switch to the TX red light, and wait for the pairing