An incomparable! Crazy! Metal! Distortion Pedal! The Hi boost provides the players the most expressive metal sound. Showing a sharper and more adjustable metal sound by choosing three mods and controlling three sound buttons. With that you can get abundant great metal sound very easily .Three mods including Boost off. Lo Boost & Hi Boost .The improvement of the high frequency of the pedal makes the heavy tone-color and difficult skills perform in a clearer level. Two high gains will satisfy the player's demand of tones just right .Great tone, easy and perfect operation. It would be easy for you to design your won guitar sound in different live performances! Feature: Entirely gaining and boosting the distortion degree of metal, has the special and strong distortion effect. Whole Aluminium-alloy classic, stable and strong True bypass provide transparent tone. LED indicator shows the working state. Specifications: Input impedance: 1 M Ohms. Output impedance: 500 Ohms. Working current: 25 mA. Power Supply: 9V AC adapter Dimensions: 95mm (D) x 44mm (W) x 48mm (H). Weight: 240g (with box). Precautions: Environment: 1.Do not use the pedal in high temperature, high humidity or subzero environments. 2. Do not use the pedal in the direct sunlight. 3. Please do not dissemble the pedal by yourself. 4. Please keep the manual for future reference. Package included: 1 x Donner Giant Metal drive guitar effect pedal. 1 x User's Manual.