● I built a 2-in-1 effects unit by referencing the fuzz factory circuit and adding a booster. ● It uses silicon transistors (the model number varies with each shipment as it's a designated transistor of our workshop, so you cannot specify it). Germanium versions are also available. ● The toggle switch on the fuzz is an oscillation cut switch. This solves the FF-type problem of unwanted oscillation when stomping on the effect aggressively, even when you don't want it to oscillate due to slight adjustments of the stab knob. Furthermore, you can enjoy switching the oscillation on and off by using this toggle switch, even when intentionally setting it to oscillate. ● The order is: Fuzz Factory on the guitar side, and the booster on the amp side. ● Of course, the booster can be used alone. ● It is handmade with hand wiring on a universal board. ● 9V batteries can be used. ● A 9V center-negative adapter can be used. ● A φ5mm high-brightness blue LED is used. ● True bypass. ● The aluminum case size is 92 x 119 x 34 (height) mm. ※ Returns are not accepted except for initial operational defects. ※ This is a reference build, so I do not use the exact same parts. Therefore, if you want to get the exact same sound, I recommend purchasing the actual unit. ● EBK is a name used only for auctions. In the original business, we adjust, create, and adjust guitar equipment such as amplifiers and effects units specialized in blues-related equipment. 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 note that we do not offer discounts.