【IDEAL VERTICAL JUMP TESTER】- Jumping Test Assessment Tool for basketball/volleyball/high jump/football lovers or athletes of any size and skill level. Suitable for home, school, gym, sports center, perfect for improving vertical jumping ability. 【ADJUSTABLE BOUNCING HEIGHT】- The stainless steel shaft can accurately adjust to the required height, and the measurement range with a vertical jump height of 1.4-2.8m or 1.4-3m or 1.7-3.2m or 1.7-3.6m. The mobile target blades are placed at an increase of 1 cm to achieve accurate jump measurement. 【ONE SECOND RESET】- professional jump measurement device easily resets the measurement color bar without the need for you to continuously use a long rod to reset, effectively freeing your hands. Ideal tool for volleyball and basketball training. 【DURABLE MATERIAL】- The vertical runout tester is made of stainless steel, which is stable and not easy to shake. The measuring color bar is made of ABS material with high toughness and durability, and the edges are designed with rounded corners to prevent scratches. 【PORTABLE EQUIPMENT】- Detachable and easy to pack, convenient for coaches and athletes to carry around for training or competition.Help coaches challenge at multiple levels, continuously increase vertical jumping ability, and break new records. So as to obtain better smashing ability.