Instructions: Transmit/receive mode switching Audio cable plugged into TRANSMITTER is the transmitting mode, the indicator light is blue and the audio cable is plugged in RECEIVE is the receiving mode, the indicator light is red and plugged into the computer is the transmitting mode, no need to plug in the audio cable, just plug it into the USB Function use launch mode (suitable for sending computer/TV/radio/MP3 audio to Bluetooth headset/audio) 1, plug the adapter into USB for power supply, enter launch mode after the blue LED flashes 2, insert one end of the audio cable into the TRANSMIT port of the adapter, The other end is plugged into the audio output port (OUTPUT) of TV and other equipment. Remarks: In the launch mode, this product has the function of USB+AUX dual input. Turn on the Bluetooth headset/audio and other devices, and enter the pairing state 4, wait for 10-20 seconds and then automatically connect successfully, the blue indicator light is always on 5, turn on the TV or computer APP music player software, and the music can be played through the Bluetooth headset/audio Receiving mode (applicable to ordinary audio/car/wired earphones, etc.) 1. Plug the adapter into the USB power supply, and enter the transmitting mode after the red LED flashes. 2. Insert one end of the audio cable into the RECEIVE port of the adapter, and the other end into the audio input port of the audio device INPUT) 3. Turn on the Bluetooth function of the mobile phone or tablet, search: YET-TR6 and click to pair 4. After the pairing is completed, the red LED is always on. 5. Open the mobile APP music player software, and the music on the mobile phone can be played through the speaker