Digital, LCD display volume Steps: 30steps (Mute,-30dB-0dB) Please send inquiry for preferential price. Speaker volume controller specification: Item No.VC-10ADLVC-20ADInput capacity10W2x10WModalityDigital ControlVolume Steps30steps(Mute,-30dB-0dB)Channel Options4Switch optionSignal Switch Rear Plastic Box Dimension86x86mm Digital speaker volume control with amplifier inside for pa system