feature:classic Distortion Sound.the 2-level Distortion Design Provides A Higher Degree Of Distortion.a Real Bypass.powered By The Ac Adapter.mini Portable, The Shell Is Aluminum Alloy Shell.the Led Indicator Shows The Working Status.the Rubber Pad On The Back Is Non-slip To Increase Stability And Avoid Friction Between The Effect Pedal And The Ground.specification:brand:kokkomodel:fds2main Material: Aluminumalloyinput Impedance: 1mohmoutput Impedance: 10kohmpower Supply: External Ac Adapter Provides 9v Dc Regulated Minimum300maitem Size: 9.4 * 5.1 * 5.3cm / 3.7 * 2 * 2.1initem Weight: 180 Grams / 6.4ouncespacking Size: 10*7.5*6.2cm/3.9*3*2.4inpackage Weight: 219g / 7.7ozpacking List:i22141 * Guitar Effectpedal1 * User Manual (english)notes:please Use A 9v Power Adapter With A Polarity Of External Positive And Internal Negative. Otherwise, The Product May Not Work Properly.