The?Pyle Pro PDWM2100 Professional Dual VHF Wireless Handheld Microphone System?is professional VHF 2 channel wireless system perfect for general speech, presentations, DJs, karaoke and more. The system features a wireless receiver, 2 wireless handheld transmitter microphones capable of simultaneous operation, dual telescoping receiver antennas, and dual volume controls with digital readout. There are separate ?? outputs for sending each microphone's audio signal into separate channels of a mixer or recording device and there is a mixed ?? stereo output as well. This system delivers a dynamic range of 80db, a total harmonic distortion of 0.5%, a frequency response of 60Hz ? 12KHz, an operating range of 50 ? 150m, and a signal to noise ration of 80dB. The receiver uses an AC 110/240V powers supply and the microphones use a 9 volt battery. The receiver measures 1.0? x 7.9? x 11.4? and each microphone measures 9.6? x 1.9? x 1.3?.