Multi-functional guitar amplifier with a portable and convenient design. - Model Name: KATANA-MINI - Adjustment Functions: Gain, Volume, Bass, Middle, Treble, Delay, Level - Power Supply: AC adapter or battery-powered - Color: Black - Connections: Input jack Thank you for viewing. Operation has been confirmed. As this is a used item, please refrain from purchasing if you are concerned about minor scratches or stains. Contents: Main unit Outer box Power adapter