A kit to upgrade your OP-1 to a visual music machine! With these stickers each key becomes as colorful as the sounds you can make with this beautiful piece of teenage engineering. Do I need coated stickers? Under intense use the uncovered colors will gradually fade out. May be it’s as cool as jeans, becoming even cooler with time? By the way, it can take up to a year of intense use of the unit to display significant proofs of work and play. And this wear out corresponds to the deep associations with the colors imprinted in the brain with those thousands of key presses. You can let the outer colors fade and see them inside yourself. Let the colors stay! If you you practice and perform a lot and know, that even after days and months of joy with the OP-1, it should stay as perfect as it was designed – choose coated vinyl stickers for it. The paint is sealed between white base layer and transparent matte lamination film and is totally protected for many years. And also it’s matte coating makes them feel more smooth to touch and to watch.