12-inch LCD Writing Board, a popular paperless notepad

12-inch LCD Writing Board, a popular paperless notepad often used for quick sketches, math practice, or kid's doodles. Key Features (from the packaging) LCD Writing Surface: Uses pressure-sensitive technology. You can draw lines of varying thickness depending on how hard you press. Battery Life (2 Years): It typically uses a single CR2025 or CR2032 button cell battery. The low power consumption means it only uses energy when you hit the erase button. Eye-Protecting: The screen has no backlight, blue light, or radiation, making it look similar to ink on paper. Environmentally Friendly: Replaces the need for thousands of sheets of paper. Lock Switch: There is usually a toggle switch on the back or side to prevent accidental erasure of your work.