● I built a 2-in-1 effects unit by referencing the fuzz factory circuit and adding a booster. ● Germanium transistors are used. (The model number varies depending on the shipment as it is the designated transistor of our workshop, so you cannot specify it.) We also sell a silicon version that is not affected by temperature differences. ● 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 unit heavily, even when you don't want it to oscillate due to the stab knob shifting slightly. Furthermore, you can enjoy switching the oscillation by setting it to oscillate on purpose and flicking this toggle. ● The order is fuzz factory on the guitar side and booster on the amp side. ● Of course, the booster can also 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. ● 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 product, so we do not use exactly the same parts. Therefore, if you want to get the exact same sound, we recommend purchasing the actual unit. ● EBK is a name used only for auctions. In our main business, we adjust, manufacture, and adjust guitar equipment such as amplifiers and effectors specializing in blues-related equipment. The number of units produced has exceeded 4,000 (as of August 6, 2024), and many professional musicians use our products. ● Six-month warranty: We manage customer information, 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.