Pyle Premier Series Professional UHF Microphone System with (2) Plug-in XLR Wireless Transmitters, Selectable Frequency, Rack Mountable - Pyle PDWM3450 Operation Range: Up to 164' ft. - LED Power Indicator & Channel Display - Audio Level Indicator for wireless system audio signal level - Independent & adjustable channel volume controls - Receiving Sensitivity: -105 dB RF Signal Indicator for transmitter signal strength - Up to sixteen separate channels to choose from - Includes two plug-in XLR wireless transmitters - 1/4" Mixed audio output jack - (2) Individual XLR balanced output jacks Individual Squelch controls - Rack mountable system What's in the Box: - Receiver Base - (2) Plug-in XLR Wireless Transmitters - Power Adapter Plug-In Transmitter Specs: - Includes (2) Plug-in Transmitters High/Low Gain Switch - 16 operational wireless channels - RF Output: &gt;10 dBm - Modulation Type: FM - Max Deviation:  68 kHz - Spurious Emission: &gt;55 dBc - Nominal Current Drain: &lt;100 mA - +5.85 V Phantom power supply - Signal/Noise Ratio: -90 dB Power Requirements: 1 x 1.5 V AA - Dimensions (L x W x H): 4.4'' x 1.15'' x 1.1'' -inches Receiver Specs: - Individual Balanced XLR Output - Mixed 1/4'' -inch Output - 16 operational wireless channels - DC nominal 800 mA