Russian Cyrillic Keyboard Stickers with Fluorescent Lettering on Black Opaque Background 5 pcs Deal. 5 Packs It uses reflective technology which reflects light coming from your monitor off the stickers, allowing you to use your keyboard even in the dark You'll be able to use your computer at night without disturbing anybody's sleep. It is made from high quality, environmentally conscientious materials It can be used on any standard keyboard or laptop. It helps people with poor sight see the letters better.