The RMW921 Wireless Microphone is a professional UHF, PLL controlled, true diversity system providing reliable and high quality signal transmission. The system is equipped with automatic channel scan and IR sync. 99 channel frequencies are available for simultaneous use of 6 devices. The system is available in two different configurations with Handheld or belt-pack transmitter. 821-832 & 863 -865 Mhz or 551 -581 Mhz (RMW921MA) frequency range. Condenser headset with cardioid capsule.