Wireless headset dynamic microphone system. PLL system with multi-channel receiver and built-in ACT system. Designed for: aerobics instructors, vocalists and singers, public speakers, dance instructors, musicals and theatre performers, schools and colleges, DJs and musicians. Receiver uses future proof frequencies UHF 863.00 – 865.00MHz. Channel 70 frequency band. Auto frequency scanning SMT technology. Preset 16 channel PLL system. Ideal working distance is up to 30 metres.