1. Insert the transmitter into the USB port of the PC/notebook. The blue indicator light flashes
2. Turn on the wireless receiving device (wireless speaker/wireless earphone/wireless receiver) and enter the pairing state
3. The transmitter automatically searches for wireless receiving devices that can be paired
4. After the pairing is completed, the transmitter will automatically install the computer driver without manual operation
5. After the transmitter and the wireless receiving device are paired, the blue indicator light is always on
6. Some computers need to set the sound output, please select JieLi-BR21 in the computer sound output