By certification 
1.2channel wireless handheld microphone.
2.LCD display screen, wide UHF 600-900MHz frequency, 200 selectable channels.
3.MCU intelligent control enhances the system status, analyses signals and blocks noises to make the sound perfect.
4.Dual sound effect compress and expand function offer higher S/N ratio and larger dynamic range.
5.Multiple squelch control circuit helps to get rid of the external interference.
