YINO Fluorescent Glow in the Dark Letter English Replacement Keyboard Stickers Layout on Light Yellow Background This product is a night light, luminous principle: first, suction light after glow, so the keyboard need to have a period of time within the light during the day before using this product, please remove the dust on the buttons and perspiration, etc, according to the keyboard layout on the corresponding button this product is not the entire paste on the keyboard, but each little piece of torn off, according to the keyboard layout on the corresponding button after labeled, please press die hard, make sticker and keyboard surface more perfect union if later no longer use, need to get off, please use a knife to gently lifting a corner of tear film