The microphone can be upgraded through the APP.

1. Connect the receiver to the phone, and keep the microphone connected to the receiver.

2. Turn on the network on the phone (WiFi/4G/5G).

3. Open the APP and click the icon in the upper right corner to upgrade.

Note:

1. During the upgrade process, the APP cannot run in the background.

2. The device cannot be turned off, ensure sufficient battery.

3. After the upgrade is complete, the receiver needs to be unplugged and plugged back in.

4. The receiver and transmitter need to be manually paired again.