Description: Intelligent Reaction Ball: This intelligent reaction ball designed to enhance your hand eye coordination and agility through fun and engaging exercises. Material: Smart Reaction Ball Made from PVC, this reaction ball is lightweight, and suitable for all ages to use.Outdoor exercise response trainer improves reaction time, hand eye coordination and quick decision making by combining mental and physical training. Size: With a diameter of 75mm, this reaction ball is the small size for easy handling during quick response training. Feature Hand eye coordination training reaction trainer tool is good for training your brain and improving your skills,suitable for reaction speed, agility and concentration training in all sports,such as football, baseball , basketball, hockey, and more. Glowing Light Feature: The reaction ball features a glowing light that flashes during use, adding an extra level of challenge and excitement to your training sessions.Training catching toys, the difficulty can be gradually increased through training to meets your need, ideal gift for kids adults. Specification: Material: PVC Size Chart: 7.5cm/2.95inch Package Includes: 1Smart Reaction Ball1 USB Cable Note: Please allow slightly errors 1-2cm differences due to manual measurement.