4 MODELS AMP BOX DIAUX INIHEADPHONE OUT This product combines four popular (AMPLIFIER) box simulation effects in the market into one shell, still using analog circuits for sound fidelity. The four (AMPLIFIER) box simulations Sound are VOXAC TONEFENDER SOUND MESA SOUND,and SOUND,which can be easily switched between four modes with one button.At the same time, our add the AUX input, headphone output, and Dl output . Analog circuit inspired from 4 models Amplifier Box InputImpedance 1MO Output Impedance 1KQ Dl out with pre/post and ground lift controls 1/8inch aux-in and 1/8inch headphone out for silent practice Power Supply DC9V Volts .center negative DC Current Draw 80mA Dimensions:12 x 9.5 x 5.5CM Color: As Shown Material: Metal Package Contents: 1 * Effects Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.