Rotate sustain, attack, level, clipping--4 knobs to adjust, control, finally get desired sound._x000D_ True bypass provides transparent tone, perfectly retains the guitar tone._x000D_ Solid durable aluminium alloy shell; glitter silver coating, rust-proof, long lasting; whole, classic, simple, nice._x000D_ Compact compressor guitar effect pedal, pocket size, light weight, convenient to anywhere._x000D_ Work stable, well, effectively reduce dynamic range, make the tracks sound more polished, provide round smooth tone._x000D_ _x000D_ Note:Compressor only, DC 9V power adapter and other accessories in pictures are not included._x000D_ Colour:Silver_x000D_ Material:Aluminum Alloy_x000D_ Size:94x39x32mm/3.70x1.53x1.25inch_x000D_ _x000D_ Package Contents:_x000D_ 1 x Guitar Effect Pedal_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_