Multifrequency microphone system, with UHF PLL technology. 1 hand-held microphone transmitter, 1 receiver, 1 plug-in power supply. True diversity system 100 selectable UHF channels (672-697 MHz). ACT function for transmitting selected frequency to the hand-held microphone via infrared signal. Autoscan funcition. Volume and squelch controls. Transmitting power can be switched at the hand-held microphone (high/low). Indication for channel, antenna A/B, ACT status and AF audio level (receiver), channel and battery status (hand-held microphone). Robust metal housing (receiver).