Sennheiser ew 500 G4 945 BW Band , UHF Wireless System, With SKM 500 G4 handheld transmitter, dynamic E945 replaceable capsule and EM 300-500 G4 9.5"" receiver, Frequency range: BW Band (626 - 698 MHz), Polar pattern: Super-cardioid, 72 MHz switching bandwidth, 20 Channel banks each with up to 32 presets, Up to 32 compatible channels, Network connection for frequency management and control via software WSM (Wireless System Manager), Frequency range: 25 - 18,000 Hz, Frequency transmission via infrared interface, Handheld transmitter with charging contacts for optional rechargeable battery BA 2015 (NiMH), Pilot tone, Autotune for finding free frequencies, Integrated EQ, Audio Gain includes 60 dB, Soundcheck Mode, 4-Digit battery indicator on the 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 unbalanced jack, Mains supply 10.5 - 16 V DC, Suitable capsules: Sennheiser EW, Neumann and MD 9235 (not included), Includes GA 3 rackmount, RJ10 connection cable, microphone holder, NT2 power adapter and 2x AA batteries