The Rocketbook Wave provides the freedom of a traditional pen and paper notebook, while instantly blasting your notes into the cloud using your smartphone. When you use Pilot FriXion pens with the Wave notebook, you can erase your notes using your microwave oven and reuse your notebook. Pilot Frixion pens use a special “thermochromic” ink which becomes clear under heat. And the Wave is specially designed to be microwave safe. So when your notebook is filled, you can use your microwave oven to heat the Wave and turn all of your notes clear in just a few minutes. Available in 2 sizes - each book comes with one pen Standard Size: 8.5 in x 9.5 in Executive Size: 6 in x 8.9 in 80 Pages Dot grid pattern on each page Acid-free, fine-grain paper Erasable and reusable up to 5 times Microwave safe Polypropylene binding Includes 1 Pilot FriXion pen WHY? We designed this microwave-to-reuse notebook with real paper to give you a natural writing experience and a quick way to erase all your pages at once. It’s also kind of fun to tell people that we microwave our notebooks.