Adjustable numbers, gently scrolling, can print out less than 100 problems efficiently and quickly. A and meaningful gift for your child or a friend's child Rotate the adjustment bar to adjust 10 different queuing styles. Satisfy all addition, subtraction, multiplication and divisors from 1-100. Develop children's logical calculation . You can also quickly prepare problems for your child . You can print quickly by simply scrolling through the problem, and it dries up quickly. Small and exquisite, easy to carry, reusable ink. The is clear and does not fade after drying. Product includes digital teaching stamp, 1 of ink. Keep the kids and quiet for a while when they need it. So, this is a great gift for kids and even parents. Colour:As shown :plastic Package Contents: 1set x Teaching Rolling Stamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.