Sennheiser ew 500 G4 Ci1 GBW Band, UHF Wireless System, With SK 500 G4 hand-held transmitter, Ci1 guitar/bass cable and EM 300-500 G4 9.5"" receiver, Frequency range: GBW Band (606 - 678 MHz), 75 MHz bandwidth, 20 Frequency banks with up to 32 presets for each, Up to 32 compatible channels, Network connection for frequency management and control via software WSM (Wireless System Manager), Frequency response: 25 - 18,000 Hz, Frequency transmission over infra red interface, Bodypack with charging contacts for optional battery BA 2015 (NiMH), Pilot tone, Autotune to find free frequencies, Integrated EQ, Audio gain over 60 dB range, Soundcheck mode, 4-Level battery indicator on transmitter and receiver, HDX compander, LCD with AF level and channel display, Switchable transmission power 10/30/50mW, 2 BNC antenna connector, XLR-Male balanced and jack unbalanced, Power supply 10.5 - 16 V DC, Includes GA 3 rackmount, Ci1 instrument cable, NT2-UK power adapter and 2x AA batteries