Sennheiser ew 300 G4 Base SK-RC AW+ Band, UHF Wireless System, Consists of SKM 500 G4 handheld transmitter, Ci1 guitar/bass cable and EM 300-500 G4 9.5"" receiver, Frequency range: AW+ Band (470 - 558 MHz), 88 MHz switching bandwidth, 20 Channel banks with up to 32 presets each, Up to 32 compatible channels, Network connection for frequency control and management via WSM software (Wireless System Manager), Frequency response: 25 - 18,000 Hz, Frequency transmission via infrared interface, Pocket transmitter with charging contacts for optional battery BA 2015 (NiMH), Pilot tone, Autotune to discover free frequencies, Integrated EQ, Audio gain includes 60 dB, Soundcheck mode, 4-digit battery indicator on transmitter and receiver, HDX compander, LCD display with NF level and channel display, Switchable transmission power 10/30/50mW, 2 BNC antenna sockets, XLR-Male balanced and jack unbalanced, Mains supply 10.5 - 16 V DC, Includes GA 3 rack mount, NT2 power supply and 2x AA batteries