Sennheiser ew 500 G4 Ci1 GBW Band, UHF Wireless System, With SKM 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