"The BOSS ME-90 is the most advanced ME model to date, offering exceptional audio quality with 24-bit AD/DA and 32-bit floating point processing, flagship-grade AIRD amp models, IR loading, an effects loop and more. Compact, battery-powered and filled with premium BOSS tones, this versatile all-in-one processor makes it easy to build customized sound setups for every playing situation." -Boss

This pedal is used in great shape. There are some slight scratches on the front and back of the enclosure. It sounds fantastic! No power supply, Battery action rocks.