Features: Must-Have for School and Home: This digital stamps roller is an absolute must-have for home, school, and fun learning centers. Print less than 100 math equations in seconds. Adjustables numbers, gentle scrolling. A fun and meaningful present for your child or your friend39;s child. Teaching stamps reusable: Small and exquisite, easy to carry, can add ink for reuse. The imprint is clear, and it dries and does not fade after printing. Quick and easy to prepares math problems for your kids at home. You can print quickly by just scrolling through the page and the math problems will print accordingly, and it dries quickly. Learning and educational present: Keep the kids busy and get yourself a moments of quiet when they need it. So, it39;s a great present for our kids and even for parents. Early Educational Math Exercise: This digital teaching stamps roller is consisted of multiplication, additions, subtraction and division exercise. Gently rolling, it can print math problems efficiently and quickly which is convenient to assign homework to children. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: As picture show Package List: Choice 1: 1X Maths Roller Stamps Choice 2: 10pcs Ink