Thank you for viewing. I was mainly sampling with this, but I'm selling it because I want some new equipment. JJOS3.16 138MB To switch versions: Hold down the TAP TEMPO button during startup to enter the paid OS2XL. Repeat the same action to return to 3.16. The F button and the dial-side button boards have been replaced with new ones. The buttons feel great. New red pads installed. Customized in various cool ways. There is a blue screen, but the screen has scratches. They are not visible when the screen is lit, so I have been using it as is. It's easy to see even in the dark, and if you want to change the contrast, hold down the Stop button and turn the dial. The contrast will change. Comes with a CF 2GB card.