I am selling a BOSS guitar multi-effects processor, the ME-20. In preparation for the sale, I have confirmed that it powers on using an AC adapter and six AA batteries (not included). 【Condition】 ・I have confirmed that the unit powers on when a guitar is plugged in, and that the sound output from the amplifier changes with each switch and pedal, and that the effects work. ・Other functions have not been tested. ・Externally, there is slight rust on each input terminal and some areas where the terminal name printing is faded. ・Otherwise, there are minor scratches and slight dirt, but nothing that is of concern. 【Features】 ・Simple operation like a compact effector. ・EZ Edit function allows for quick sound creation. ・Equipped with "OD/DS Solo function" for powerful guitar solos. ・A4-sized aluminum die-cast body, also operable with dry cell batteries. 【Included Items】 ・AC adapter (BOSS PSA-100G) * Batteries, instruction manual, and outer box are not included. This is a used item with a history of use, so please understand that there is no warranty after purchase. Manufacturer: BOSS