Sennheiser EW-D ME3 R4-9, Digital Wireless System, With ME 3-II condenser headset microphone, Frequency range R4-9: 552 - 608 MHz, Polar pattern: cardioid, Switching bandwidth: 56 MHz, Dynamic range: 134 dB, Audio transmission range: 20 - 20000 Hz, Transmitter power: 10 mW, 4-Digit battery indicator on receiver, Mobile access possible via Smart Assist App for system settings, Operating time with AA batteries: up to 8 hours, 2 BNC antenna connectors, Outputs: XLR, jack (balanced/unbalanced), Incl. 2 x antennas, power supply with country adapter, rackmount set and AA batteries