Formula Sound AVC 2D - Automatic Volume Controller, enables volume control without loss of dynamics, frequency range: 20 - 20000 Hz, max. frequency range: 20 - 20000 Hz. Input Level: +22 dBu, Threshold Range: -20 dBu to +10 dBu, Attenuator Range: 0 dB to -80 dB, LCD display, 3 operating modes (stereo, mono, stereo with microphone control), Input: 2x XLR female, 1x XLR female Control Mic, Output: 2x XLR male, 3x 4-pin auxiliary connectors, Dimensions (W x H x D): 482 x 44 x 200 mm, Weight: 5.0 kg