Sennheiser EW-D SKM-S Base Q1-6, Digital Wireless System, With SKM-S handheld transmitter with mute switch, Frequency range Q1-6: 470.2 - 526 MHz, Switching bandwidth: 56 MHz, Dynamic range: 134 dB, Audio transmission range: 20 - 20,000 Hz, Transmitting power: 10 mW, 4-Digit battery indicator on receiver, Mobile access 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. microphone clamp MZQ 1, 2x antennas, power supply with country adapter, rackmount set, AA batteries