Feature: 1. This effect pedal can provide core tone enhancement from 2db to 20dB, making it easier to adjust the tone. 2. Offers an extra boost for your guitar without losing the signature tone, and the playing will be more attractive. 3. True bypass design ensures minimum tonal loss and also maintains the excellent sound quality, very practical. 4. The white metal shell with beutiful pattern is not only a highlight on the stage, but also has great durability. 5. Compact design with light weight adds more convenient to storage and carrying for daily use. Specification: Item Type: Guitar Effect Pedal Material: Metal Colour: White Power Requirement: 9V DC centre negative pole (9V power supply or battery not included). Current Consumption: 30mA One Key Control: + 2db, + 4db, + 8db, + 12db, + 16db, + 20db. . Package List: 1 x Guitar Effect Pedal 4 x Foot Pad1 x 9V Power Cord Note: The positive and negative poles of the power supply must be the same as the positive and negative poles of the effect pedal.