(1)The effect of U3 is the new design by Rigao.
(2)Two ubaided groups of incept system, Excellent receiver.
(3)16 sets of U-3 can work at the same time. The channel can be setting at will, No
  jamming, wireless MIC with intellectualized switch.
(4)Used UHF 800MHz channel to avoid interferential frequency.
(5)LCD screen show all the messages, it can show the intensity of high frequency, trends
  of audio frequency, frequency of every channel and so on.
(6)Used the level of frequency system, there are 16 choiceness channels and 400 free
  choice channel.
(7)The effective distance can be 100 meters.