Martin Ranger WM100 VHF Dual Channel Wireless Microphone: * Desktop receiver and enhanced muting, high signal/noise ratio * Almost zero noise output when standby * Broad frequency response range, super low distortion * No impact on switching receiver, ensure safety of rear stage amplifier system and speaker * Perfect operative status signals, fluorescence display, with digital microphone * Over 30m in ideal circumstances; practical 20m radius in complex circumstances * Dual frequency design * Applicable for medium and small stages, karaoke halls and home entertainment etc.