Multi-function drive effector, allows for sound quality adjustment. - Model Name: DRIVE Breaker DB-4 - Brand: sobbat - Function: Drive Effector - Control Knobs: Volume, Gain, Tone, Boost - Country of Manufacture: Made in Japan - Power: 9V AC adapter Operation confirmed with AC adapter. Battery operation has not been confirmed. Selling to organize equipment. The DB-4 is an effector from Kyoto. This is the initial model, different from the DB-4R. This effector combines four types: overdrive, two types of distortion, and a booster. When used with a clean or flat amp, it has a dry sound, but when used on an amp that already has distortion, it adds a nice flavor. I used it lightly over a crunch sound. Please understand that this is a used item, and only those who can purchase it with no claims and no returns are welcome. Guitar Effector Overdrive Distortion