The SENNHEISER's EW100 G4 835S is a rackmount wireless microphone system that provides presenters, clergy, lecturers, and performers working in business and educational settings. A genuine diversity half-rack receiver is contained in a sturdy, full-metal chassis in the EW 100 G4-835-S. The receiver's auto-scan function looks for a clean, interference-free channel for your audio transmission across a wide 46 MHz UHF tuning range with 1840 selectable frequencies. An SKM 100 G4-S portable transmitter with an interchangeable MMD 835 dynamic cardioid microphone capsule designed for speech is included in this system. With a set 30mW RF power output and a transmission range of up to 330', the handheld transmitter can run for up to 8 hours on two AA batteries. Up to 12 wireless microphones can be used in the same place at the same time, with the receivers linked together for quick multi-channel frequency setting.