Usage:
Shout: press the power switch button. The power indicator is on. The sound source is as close to the built-in microphone as possible.
Recording: press the power switch button, then press the recording button and the playback button at the same time, the sound source is close to the microphone, start recording, and then open two buttons after recording.
Sound out: press the power switch, and then press the sound down button.
Music: 120 second has no music function
Volume control: from small to loud until sound is appropriate.

Product performance:
Transmission distance: > 300 m
Recording time: 120 seconds
Distortion: < 1%
Maximum power: greater than or equal to 5W
Working voltage: DC6V