Fangrui Product Details Easy Installation: Designed With A Strong Wall-mounted Suction Cup And Powerful Double-sided Foam Adhesive, The Vertical Jump Tester Is Easy To Install On Multiple Surfaces Such As Glass, Tiles, Boards, Or Walls. This Versatility Allows For Its Use In A Wide Range Of Settings, Accommodating Different Environments And Ensuring Convenience. Durable Material And Reset Mechanism: Constructed From Sturdy Abs Material, The Vertical Jump Tester Is Built To Withstand Regular Use Without Easily Getting . The Design Includes A Reset Lever On The Markers, Allowing For Quick And Convenient Resetting After Each Jump, Ensuring Accurate Measurements. Enhance Training And Foster Resilience: The Vertical Jump Tester Is A Valuable Tool For Helping Children Improve Their Vertical Jump, Enhancing Their Physical Agility, And Motivating Them To Challenge Themselves. It Not Only Aids In Physical Training But Also Cultivates A Resilient Mindset And A Desire For Self-improvement. Convenient Measurement And Adjustable Height: Wit