SOPALI Smart Digital Math Roller Stamp(+),(-),(x) & division for teaching stump  (Black)

Sopali roller Math Stamps Come In 4 Styles (Addition ,Subtraction, division & multiplication), Just Scroll Gently, Math Problems Will Appear In Front Of You, It Can Print Out Math Problems Efficiently-And Quickly., The Math Roller Stamp Is Made Of Durable ABS Material And Uses The Good Cuts To Ensure A Clear-Impression Every-Time. Dries Quickly Without Fading., The "Math Practice Number Rolling Stamp" Has 10 Different Ways To Queue, And You Can Change The Calculation Questions With Just The Turn Of A Button., The Roller Digital Teaching Stamp Is Small And Exquisite, And Comes With A Storage Box For Easy Carry. When The-Ink Is Used Up, You Can Fill It On The Roller Side., Math Roller Stamp Can Develop Your Child/Student's Logical Calculation Ability And Improve The Speed And Accuracy Of Oral Calculation. As The Perfect Learning Toy, Teaching Stamps Make Great Gift For Birthdays, Christmas, Halloween, Thanksgiving And New Year’s. this is perfect for students .