Enhance training and foster resilience: The vertical jump tester helps children improve their vertical jump, enhance physical agility, and stay motivated to challenge themselves. It supports physical training while cultivating a resilient mindset and a drive for selfimprovement. Clear measurement and adjustable height: The device is 25 cm long with markers for every centimeter, making vertical jump measurements precise. The installation height is adjustable to suit children of different ages and varying skill levels. Easy installation on multiple surfaces: It uses a strong wall mounted suction cup and powerful double sided foam adhesive, allowing installation on glass, tiles, boards, or walls. This versatility enables use in a wide range of environments and settings. Durable material and convenient reset: Made from sturdy ABS material to withstand regular use. A reset lever on the markers allows quick and convenient resetting after each jump, ensuring consistent, accurate measurements. Practical use scenarios: Home practice with children in a living room or play area to track progress over time. School PE classes or gym settings to measure and compare students' vertical jump during drills. Physical therapy or athletic training environments to monitor improvements during rehabilitation or strength programs.