Sennheiser ew 100 G4-835-S GB-Band, UHF Wireless System, Includes an SKM 100 G4-S handheld transmitter with mute switch and interchangeable E835 capsule, GB-Band (606 - 648 MHz), Transducer principle: Dynamic, Directional characteristic: Cardioid@+*Properties of the 9.5"" EW 100 G4 receiver:*@+@+, 42 MHz switching bandwidth, 20 Channel banks with up to 12 presets each, Up to 20 compatible channels, Fast frequency allocation for up to 12 receivers via link function with RJ10 connecting cable, Frequency response: 25 - 18,000 Hz, Frequency transmission via infrared interface, Handheld transmitter with charging contacts for 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 receiver (and on the handheld transmitter), HDX compander, LCD display with RF/AF levels and channel display, Transmission power: 30 mW, 2 BNC antenna sockets, XLR male (balanced) and jack (unbalanced), Power supply: 10.5 - 16 V DC, Includes a rackmount, RJ10 connecting cable, microphone mount, NT2 power supply, and 2 AA batteries