Product Description This was made with reference to the circuit of the Marshall Shred Master. The circuit board uses a quad op-amp, so it is not the early type, British-made, etc. This is a 2-in-1 effector with an added booster. The booster can also be used alone. ● This is a distortion effector famous for being used by My Bloody Valentine's Kevin Shields, and Radiohead's Thom Yorke, Jonny Greenwood, and Ed O'Brien. ● It is handmade on a universal circuit board with hand wiring. ● 9V batteries can be used. ● A 9V center-negative adapter can be used for power. ● A φ5mm high-brightness blue LED is used. ● True bypass. ● The aluminum case size is 92 x 119 x 34 (height) mm. ● EBK is a name used only for auctions. In the original business, we specialize in blues-related amplifiers, effectors, and other equipment adjustments, production, and guitar adjustments. The number of units produced has exceeded 4000 (as of August 6, 2024), and many professional musicians use them. ● Six-month warranty: We manage customer records, so if a failure occurs during normal use, we will compare it with the shipping records and repair it free of charge within six months. (However, you will be responsible for the shipping costs.) ● Price includes shipping. ※ Please refrain from returns except for initial operational defects. ※ This is made only as a reference, so we do not use the exact same parts. Therefore, if you want to get the exact same sound, we recommend purchasing the actual unit. ※ Please note that the decal may differ from the photo.