● Modified and built based on the circuit of the Fuzz Factory. ● Silicon transistors are installed (the model number will vary with each shipment as it is a designated transistor of our workshop, so it is not possible to know in advance which transistor will be used. Germanium versions are also available.) ● The toggle switch on the fuzz is an oscillation cut switch. This eliminates the FF-type problem of unwanted oscillation when stomping on the effect pedal vigorously, even when you don't want it to oscillate due to slight adjustments of the stab knob. Furthermore, you can enjoy switching the oscillation by intentionally setting it to oscillate and toggling this switch. ● Hand-wired construction on a universal board. ● 9V battery use is OK. ● A 9V center-negative adapter can be used. ● φ5mm high-brightness blue LED is used. ● True bypass. ● The aluminum case size is 60 x 112 x 31 (height) mm. ※ Returns are not accepted except for initial operational defects. ※ This is a reference build, and we do not use the exact same parts. Therefore, if you want the exact same sound, we recommend purchasing the actual unit. ● EBK is a name used only for auctions. In our main business, we specialize in adjusting, producing, and repairing equipment such as amplifiers and effectors, and adjusting guitars, all related to blues. 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 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.