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By certification 
1.4channel wireless microphone UHF600-900MHz, frequency, 200selectable channels.
2.Flexible, simple and convenient to operate.
3.Advanced digital PPL to ensure the unit in high stability and wide frequency response.
4.LCD display screen.
5.MCU intelligent control enhances the system status, analyses signals and blocks noises to make the sound perfect.
6.Dual sound effect compress and expand function offer higher S/N ratio and larger dynamic range
