Sennheiser ew 500 G4 MKE2 BW Band, UHF Wireless System, Consists of SK 500 G4 bodypack transmitter, MKE2 condenser lavalier microphone and EM 300-500 G4 9.5"" receiver, Frequency range: BW band (626 - 698 MHz), Polar pattern: Omnidirectional, 72 MHz switching bandwidth, 20 Channel banks each with up to 32 presets, Up to 32 compatible channels, Fast frequency allocation for up to 12 recipients via link function with RJ10 connection, Frequency response: 25 - 18.000 Hz, Frequency transmission via infrared interface, Bodypack 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, Power supply 10.5 to 16 V DC, Includes GA 3 rackmount, RJ10 connection cable, power supply NT2 and 2x AA batteries