The mini portable guitar amplifier very save space ，let you carry it without too much effort.Convenient for indoor and outdoor exercise.Hardly listen noiseBrand new and high quality.With volume， tone and ON/OFF control switch3-inch professional sounds speaker of heavy metals6.35 Single-channel input， headphone output can connect external mixerMaterial: plastic， metalColor: black + goldSpecification:Power output:3W RMSInput:1xInputSpeaker:1x3”Controls: Volume Treble Power On/Off & Overdrive S/WDC Jack DC 9V(Adapter 500mA or more) Battery: 1 x built-in 9V battery Powered by DC 9V external power or 9V battery (not included) Power: 3WDimension(L)x(W)x(H): 122 x 60x 125 mm Package included 1 x Electrical guitar amplifier