Sennheiser ew 100 G4-ME3 1G8-Band, UHF Wireless System, Includes an SK 100 G4 pocket transmitter and an ME 3-II condenser headset microphone, Frequency range: 1G8 (1785 - 1800 MHz), Includes a rackmount, an RJ10 connector cable, an NT2 power supply, and 2x AA batteries @+*Features of the ME 3-II condenser headset microphone:*@+@+, Directional characteristic: Cardioid@+*Features of the EM 100 G4 9.5"" receiver:*@+@+, 15 MHz switching bandwidth, Up to 12 compatible channels, Fast frequency allocation for up to 12 receivers via link function with RJ10 connection, Frequency range: 25 - 18,000 Hz, Frequency transmission via infrared interface, Pocket transmitter with charging contacts for an optional BA 2015 battery (NiMH), Pilot tone, Automatic frequency scan feature locates available frequencies, Integrated EQ, Audio gain: 60 dB, Soundcheck mode, 4-Digit battery indicator on the transmitter and receiver, HDX compander, LCD display with RF/AF levels and channel display, Transmission power: 10 mW, 2 BNC antenna sockets, XLR male (balanced) and jack (unbalanced), Power supply: 10.5 - 16 V DC