Feature: 1. Automatic Counting: Our children vertical jump tester is equipped with electronic counting device, you can count how many times your child jumps. 2. Exercise: Touch vertical jump provides an opportunity to get kids interested in sports and encourage kids to be physically active. 3. Easy to Use: Our touch high jump counter is very easy to use, just stick toy where you need and jumping toy is convenient and easy. 4. Safe: Our touch toys are made of high quality ABS material, have no odor and do not contain any harmful substances, you can use them with confidence. 5. Easy to Clean: This touch vertical jump toy is very easy to clean, just scrub repeatedly with a damp rag, and the touch toy can also be recycled. Specification: Item Type: Touch HighJumpCounter Material: ABS Diameter: Approx. 9cm / 3.5in Battery: 2 x AAA battery ( Battery Not included) Package List: 1 x Touch HighJumpCounter 4 xGrowth Chart 2 x Glue How to use: Installthebattery,pastetheproductintheidealposition,andtherewillbeasoundpromptwhenyoutouchit