Wireless microphone system, 42 MHz bandwidth: 1680 switchable frequencies for interference-free reception, enhanced frequency bank system with up to 12 compatible frequencies, True Diversity high-quality reception, automatic scanning of available frequencies, illuminated graphic display, HDX expander for crystal clear sound, programmable MUTE function, integrated equalizer and Soundcheck mode, contacts for recharging BA 2015accupack directly on the transmitter. 12 presets, frequency response: 25- 18,000 Hz, includes 1 EM 100 G3 rack mountable receiver, 1 SK 100 G3 bodypack transmitter, 1 ME 2 omni directional clip-on microphone, 1 NT 2 power supply, 2 antennas, 2 stacking elements and 2 AA batteries.