The Mr. DJ MICVHF8800 is a professional VHF wireless microphone system with 4-channel microphone for quad mic operations. It features a desktop receiver, enhanced muting, audio mute circuit for quiet operation, AF signal LED meter on each channel, and almost zero noise output when in standby mode. It delivers an operating range of up to 240?, a frequency setting of 210 ? 280MHz, a frequency range of 180 ? 300MHz, a sensitivity of 30dB, a signal to noise ration of 60dB, a distortion factor of less than 1%, and a frequency response of 100 ? 12,000Hz. This unit measures 20? x 12? x 3?.