This is a set of two Sakura Cray-Pas electric erasers. When you turn on the switch, the eraser spins at high speed, allowing you to efficiently and cleanly erase even fine details. RADIC RE-2000 RADIC RE-3000N Both operate on two AAA batteries. They have been stored for over 10 years, so there is some cosmetic aging, but they still work when batteries are inserted. Please be aware that there are minor scratches on the surface from use. There are no noticeable cracks that would make them unusable. I will also include two batteries and 15+ replacement erasers that were stored with them. Perfect for those in architectural design, design, manga, or illustration. Please understand that these have been stored at home by a non-professional. Thank you.