Donner Compressor Pedal Ultimate Comp Guitar Effect PedalCategory: Compressor Sustainer Guitar EffectsDonner Compressor Pedal Ultimate Comp Guitar Effect Pedal Features: 1. TLevel, Comp, Tone knobs allow you to dial in your desired sound. Two modes: Normal and Treble compression2. Our circuit has been optimized according to the characteristics of the electric guitar and performs outstandingly over the spectrum of different playing styles3. The compressed tone is round and smooth, full of musicality, and perfectly retains the original guitar tone4. Whole Aluminium-alloy classic, stable and strong. True bypass provide transparent tone.5. DC 9V Adapter power supply. Working Current: 12mAUltimate Comp Specifications Power Supply：9V DC (Negative in the center). Two Modals: Normal and Treble. Level Knob: Control the sound volume with effect. Tone Knob: Control the tone of sound.Comp Knob: Adjust the intensity of compression. Input & Output Jack: Analogy though 1/4” mono audio jack. LED Light: LED indicator shows the working state. Full metal shell：Aluminum-alloy classic, stable and strong.True Bypass: True bypass for zero tone coloration.Good Comp Tone The Ultimate Comp stompbox is an optical compressor that provides a smooth compressed tone, while maximizing the punch of your notes. You will feel as if every sound from your amp was mastered in the studio. And we added an optional modes end into your sound. Easy to Control There are three function knobs, namely LEVEL, TONE and COMP. Two models: Normal and Treble. You can just control three function knobs and choose the model you want to made you own music tone. Enjoy your own fun and colorful life. Classic Design As you can see, Ultimate Comp have a classic mini size, convenient and durable. True bypass switch lets your instrument’s signal pass through a non-electronic bypass line when the effect is disengaged, feeding your amp with direct, unaltered signal from your instrument. Return policy: We strive to ensure complete customer satisfaction with every transaction. If you have any quality problem with the product within 90 days after purchase, you could contact us for a refund or replacement. 1-2 inches error of the measuring is a reasonable range due to different measurement methods. Pls confirm the size according to our description instead of the photos. Return by Dimensions problem is not accepted. If return for size, color, material or other reasons that not caused by quality problems, we're sorry that customer has to charge the return shipping cost. Items must be returned in the original manufacturer's packaging. We strongly recommend you keep your packaging for at least the first 90 days after purchase.