Sennheiser SK 100 G3 Compact Bodypack Transmitter CH A by Sennheiser. Save 33 Off!. $279.95. The Sennheiser SK 100 G3 Wireless Bodypack Transmitter has an easy-to-read graphic display, infrared sync, charging contacts, cable emulation, RF mute, an intuitive menu and much more. As features alone are no substitute for audio quality, the AF frequency response was expanded to 25-18,000 Hz for the truest sound.