S4.10W UHF Headworn System with HM66 (SJ66) Headmic + AB1000 CH38The S4. 10 W EB GG3 comes in channel 38 with 16 selectable frequencies and comes with one Beltpack Transmitter, one Headset Microphone (MIC SJ66 in either blue, black or yellow) and one Neoprene Aerobic Belt (ACC AB1000). Product Features 16 frequencies available Up to 10 simultaneous channels Fully synthesised PLL quartz tuning technology Receiver LEDs show AF peak level, RF level & diversity channel A or B Diversity operation with detachable antenna