DJI Mic transmitters and receiver are already linked by default. If you need to link them again, you can do so in the following ways: Method 1: Put the receiver and transmitters into the charging case and they will pair automatically. This method only applies to DJI Mic (2 TX + 1 RX + Charging Case). Method 2: Turn on the receiver and transmitters. Scroll the screen of the receiver downward to enter the control center page. Slide to the left and tap “Settings” to enter the settings page. Slide to the left again and tap “Link” to enter linking mode. Then, press and hold the link button on the side of the transmitters until the green light on the top-left corner flashes and wait for the linking to finish. When the linking indicators of the transmitters turn solid green, it means the linking is successful. This method applies to both DJI Mic (2 TX + 1 RX + Charging Case) and DJI Mic (1 TX + 1 RX).