Fangrui Product Details Rotate Sustain, Attack, Level, Clipping--4 Knobs To Adjust, Control, Finally Get Desired Sound. True Bypass Provides Transparent Tone, Perfectly Retains The 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. Note:compressor Only, Dc 9v Power Adapter And Other Accessories In Pictures Are Not Included. Colour:silver Material:aluminum Alloy Size:94x39x32mm/3.70x1.53x1.25inch Package Contents: 1 X Guitar Effect Pedal 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.