Sennheiser ew 300 G4 Headmic1 RC AW+ Band, UHF Wireless System, With SK 300 G4-RC with remote control, condenser microphone SL Headmic1 and EM 300-500 G4 9.5"" receiver, Frequency range: AW+ Band (470 - 558 MHz), Polar pattern: Omnidirectional, 88 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, power supply NT2 and 2x AA batteries