DGX660 is a hybrid of an arranger and a digital piano. It has 88 keys and an attractive look. So it's a good choice for someone who's looking for piano experience with more entertainment. You can learn what's a digital piano and what's an arranger watching this video of mine. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xrN17tj4-Co.html