The Technical Pro WM1641 Professional UHF Quad Wireless Microphone comes complete with a base transmitter that has a 1U rack mountable design and 4 dynamic cardioid directional Ultra High Band Wireless Microphones. The base and microphones are both stylish and durable. The front of the base shows LED meters for both microphones and has four separate digital panels showing the frequency information. The cardioid directional design is meant to only translate a direct signal into the microphone. This will give you the ability to address a loud room like a club or large stage performance and not worry about any type of feedback. And if you are addressing a large room or audience no need to worry about any unwanted crowd noise getting picked up in your microphone! The benefits of a wireless microphone also include giving you the freedom you need to move around the stage or room without the hassle of messy wires. Move around freely without worrying about getting tripped up! In today"s world of technology and communication wireless signals can often be interrupted. In any given space and especially in densely populated areas like a city, the atmosphere is filled with various signals that can interrupt your equipment. The WM1641 uses a UHF design, a step above a normal VHF design, and as such the UHF design has a much less chance of interference. Outputs - Individual XLR outputs per channel one 1/4 mixed output. Frequency range - 620MHz-683MHz. Frequency stability - +0.005%. Modulation mode - FM. Maximum deviation range - +25kHz with limiting compressor. Frequency Response - 40Hz-20kHz. Signal to noise ratio - 100dB.