Description Main Features: - 2-channel design can use two handheld wireless microphones without interference at the same time. - High precision quartz crystal to lock the frequency. - High sensitivity and high S/N ratio high fidelity without noise. - Superior selectivity multi-channel can use at the same time do not interfere with each other. - Suitable for studio / karaoke / radio / etc. - Using distance is up to 50 meters in ideal environment practical distance is from 30 - 40 meters in complex environment. System Parameters: - Frequency range: 210 - 280MHz - Frequency response range: 60Hz - 16KHz - Harmonic interference: more than 90dB - Radio frequency stability: plus or minus 0.005 percent - S/N ratio: more than 90dB - Microphone impedance: 600 ohm - Output intensity: 0 - 400mv - Harmonic distortion: less than 0.5 percent - Microphone is powered by 2 x 6F22 9V battery ( not included ) - Microphone dimension: 240mm x 30mm x 25mm - Receiver dimension: 215mm x 140mm x 35mm WM-03V  Dual wireless microphone Channels: 2 (2.0) Model Number: WM - 03V Special Feature: PortableWireless Product weight: 0.622 kg Package weight: 0.913 kg Package Size(L x W x H): 35.00 x 27.50 x 5.50 cm / 13.78 x 10.83 x 2.17 inches Package Contents: 2 x Microphone 1 x Receiver 1 x English User Manual 1 x Connect Cable