Volume decrease button: Press once to decrease the volume by one level, long press to continue decreasing.
Microphone mute indicator light: This red indicator light turns on when the microphone is in a mute state.
Mic mute button: Press once to mute the microphone, the red indicator light will turn on, press again to unmutethe microphone, and the indicator light will turn off.
Work status indicator light: The blue light remains on during standby mode, but flashes during communication.
Volume up button: Press once to increase the volume by one level, long press to continuously increase the volume. Background sound pickup hole.