Pyle Pro PDWM5500 VHF Wireless 4 Microphone System: * Professional VHF wireless system with quartz lock for drift-free operation * Power on/standby/off switch * Power LED indicates status * Audio mute circuitry for quiet operation * Advanced commanding circuitry * AF signal LED segment meter on each channel * Individual volume controls with LED display * Individual 0.25" unbalanced outputs * XLR balanced and 0.25" unbalanced mixed output * 110V - 220V selectable * Includes 4 microphones, batteries, 0.25" audio cables and rack hardware * Frequency range: 210MHz - 280MHz * Operation range: up to 240"