Features: Rotate sustain, attack, level, clipping--4 knobs to adjust, control, finally get desired sound. True bypass provides transparent tone, perfectly retains the original guitar tone. Solid durable aluminium alloy shell; glitter silver coating, rust-proof, long lasting; whole, classic, simple, nice. Compact compressor guitar effect pedal, pocket size, light weight, convenient to anywhere. Work stable, well, effectively reduce dynamic range, make the tracks sound more polished, provide round smooth tone. Specifications: Material: Aluminium alloy Color: Silver Item Size: 94*39*32mm / 3.70*1.53*1.25in Item Weight: 165g / 5.82oz Package Size: 11*6.5*6cm / 4.33*0.25*0.23in Package Weight: 180g / 6.34oz Note: Compressor only, DC 9V power adapter and other accessories in pictures are not included. Due to lighting or other reasons, the picture and material object may slightly differ. Due to manual measurement, there may be deviation, please in kind prevail. Packing List: 1 * Compressor