Sennheiser EW-D CI1 S1-7 - Digital wireless system with Instrument cable CI1, bandwidth: 56 MHz, Dynamic range: 134 dB, Audio transmission range: 20 Hz - 20 kHz, Frequency range S1-7: 606,2 - 662 MHz, Transmit 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 jacks, Outputs: XLR, jack (balanced/unbalanced), incl. 2x antennas, power supply with country adapters, rackmount set, AA batteries