Sennheiser ew 300 G4 Base Combo GBW Band, UHF Wireless System, Consists of: SKM 300 G4-S handheld transmitter with mute switch (without capsule), 1x SK 300 pocket transmitter, and the EM 300-500 G4 9.5"" receiver, Frequency range: GBW band (606 - 678 MHz), 72 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), Frequency range: 25 - 18,000 Hz, Frequency transmission via infrared interface, Handheld transmitter with charging contacts for optional BA 2015 (NiMH) battery (battery not included, must be purchased separately), Pilot tone, Automatic frequency scan feature locates available frequencies, Integrated EQ, Audio gain: 60 dB, Soundcheck mode, 4-Digit battery indicator on the transmitter and receiver, HDX compander, LCD display with RF / AF level- and channel display, Switchable transmission power: 10 / 30 / 50 mW, 2x BNC antenna sockets, Balanced XLR male and unbalanced jack, Power supply: 10.5 - 16 V DC, Includes GA 3 rackmount, microphone holder, NT2 power supply, and 2x AA batteries, Corresponding capsules (not included, must be purchased separately): EW Sennheiser, Neumann, and MD 9235@+*Note:* Parallel operation is not possible, only one transmitter can be in operation at a time.@+@+