Sennheiser ew 300 G4 Headmic1 RC GW Band, UHF Wireless System, SK 300 G4-RC with remote control, condenser microphone SL Headmic1 and EM 300-500 G4 9.5"" receiver, Frequency range: GW band (558 - 626 MHz), Characteristic: Ball, 88 MHz Switching bandwidth, 20 channel banks with up to 32 presets each, Up to 32 compatible channels, Network connection for frequency management and control via software WSM (Wireless System Manager), Audio transmission range: 25 - 18,000 Hz, Frequency transmission via infrared interface, Pocket transmitter with charging contacts for optional battery BA 2015 (NiMH), Pilot tone, Autotune to find 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 times balanced and jack unbalanced, Mains supply 10.5 - 16 V DC, Includes GA 3 Rackmount, RJ10 connection cable, NT2 power supply and 2x AA batteries