This series of products for four channels infrared automatic frequency of multi-channel wireless microphone, 200 frequency points are optional.Products with less noise interference of UHF frequency band PLL phase locking technology, increasing to 250 KHZ between each frequency point. Perfect noise interference characteristics, no similar system can match.All metal material standard case,1 u metal panel configuration 4 channel receiver,LCD screen assembly, respectively, according to working channel, working frequency, the audio signal.Good and fast understand all the actions of the receiver information.Electronic operation button control panel.Host 4-way balanced audio output plugs respectively, and 1 road mixed unbalanced output, comprehensive to meet the needs of all kinds of connections.