Silver digital power amplifier with volume and balance adjustment. - Model: Digital Power Amplifier - Color: Silver - Input Terminals: RCA terminals (red/white) - Output Terminals: Speaker terminals - Power Supply: AC power - Adjustment Knobs: Volume adjustment knob, balance adjustment knob Please note that this is a used item and may have some dirt and scratches on the surface. Operation and power-up have been confirmed. If you have any questions, please feel free to ask in the comments section. Also, please take a look at my profile for other speaker terminals. Thank you for viewing.