Common frequency countering methods:

1. First, turn on the speaker and microphone, press and hold the "↑" button facing the microphone upwards for 3-5 seconds, and let go after the screen appears (SEL) character flashes into the setting state;

2. Then short press the "↑" or "↓" button to change the frequency point, commonly used frequency points A01, B51

3. After selecting the frequency point, immediately face the microphone display to the audio display (face to face) for 10-15 seconds to complete the frequency matching.

(If the fixed frequency microphone does not need to be manually frequency matched, just install the battery and turn it on).