Ultra wide dynamic range and extraordinary open tube-like drive sound 2 Working Modes: BOOST/NORMAL BOOST: High mode, boost up the bottomend, when increasing distortion by Gain knob. you volume and a slight increase in high-mid range (around 3.5KHz) NORMAL: Low mode, color up extreme little to the original-sound, very nice for clean boosting Input: 1/4Inch monaural jack (impedance: 470k Ohms) Output: 1/4Inch monaural jack (impedance: 1k Ohms) Power Requirements: AC adapter 9V DC (center minus plug) Current Draw: 6 mA Dimensions: 95mm (D) x 45mm (W)x 53mm (H) NOTE:Please be noted the Power supply is not included. Colour:White Material:Metal Package Contents: 1 * Guitar Pedal 1 * English instruction manual 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.