YAMAHA MIDI Keyboard CBX-K1B Yamaha Skeleton Blue I have confirmed that the power turns on when connected to my AC adapter, but I haven't been able to test its functionality with a computer because I don't have the necessary cables. Therefore, I am selling it as junk. There are few scratches, but the white parts, such as the jog dial, have discolored over time. I have not tested it with batteries. Please consider this item only if you understand the above. The item includes the main unit only; no accessories are included.