Usage:
Shoutout: press the power switch button, the power indicator light is on, the sound source as close as possible to the built-in microphone.
Recording: press the power switch button, then press the recording button and the playback button at the same time, and the sound source is close to the microphone.
Playback: press the power switch and press the lower tone button.
Music: 120 second without music function
Volume control: from small to large until sound is appropriate.

Product performance:
Transmission distance: > 300 m
Recording time: 120 seconds
Distortion: < 1%
Maximum power: over 5W
Working voltage: DC6V