● This is an effects pedal modified with an added pre-gain, based on the Tycobrahe Octavia circuit. ● It is hand-wired on a universal circuit board. ● 9V battery operation is OK. ● A 9V center-negative adapter can be used. ● A φ5mm high-brightness blue LED is used. ● True bypass is implemented. ● The aluminum case size is 66 x 121 x 39 (height) mm. ● EBK is a name used only for auctions. The original business specializes in the adjustment, production, and guitar adjustments of equipment such as amplifiers and effects pedals related to blues music. 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 under 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. We also have vacuum tube amplifiers and effects pedals for sale, so please take a look.