1、PREMIUM MATERIAL: Vertical jumping tester in lightweight aluminium for greater lightness and durability. Reinforced alloy steel for strong quality. Easy to install. 2、FIRMLY AFFIXED: The jumping trainer is made of nano wall protection adhesive, which does not hurt the wall (once applied, on doors, wall, tiles) paste firmly. 3、EXERCISE ABILITY: The jumping trainer increases the child's motivation to play sports; exercises hand eye co‑ordination; and has a very good effect on children with sensory disorders. 4、GOOD BENEFITS: The daily exercises not only help children's brain development, reduce study fatigue, reduce dependence on mobile phones and protect their eyesight, but also help them grow taller. 5、EASY TO USE: The vertical jump training measurement tool is very easy to use, jump up and touch the basketball shaped object to get a count and see how many jumps you have made in a minute. Item Type: Vertical Jumping Tester Material: Lightweight Aluminium + Steel Battery Type: AA Battery Battery Capacity: 1500mah (shipped with Matching Batteries) Applicable Age: For 2-18 Years Old Lifespan: 10 Years or More Counting Range: 0-99999 Product Features: No Traces of Adhesion, Super Strong Adhesive, Nano Material, Recycling Functions. 1. Can Increase the Motivation of Children to Play Sports 2. Easy to Install 3. Exercise Children's Hand Eye Coordination 4. Good for Children with Sensorimotor Disorders 5. Jumping Every Day Can Help Children Grow Taller 1 x Counter 1 x Battery 1 x Jumping Trainer 2 x Adhesive Sticker