Features:Exercise with powerball is completely equidistant, so it can complement any training method. Powerball exercises the arms in a way that conventional isotonic (free weight) exercise training cannot achieve, and it can absorb a higher percentage of muscle fibers in a shorter time. If you want to improve your wrist, grip and arm strength, then the wrist training ball will be your perfect choice Introduction:*Strong PowerThe maximum possible rotation speed exceeds 12,000 rpm, which can generate resistance of up to 32kg. It is the ultimate product of wrist exercise equipment-slow rotation for gentle rehabilitation, or fast rotation for forearm exercises for no more than 60 seconds.*Good TrainerWhether playing drums, piano, saxophone or guitar, musicians need to maintain strength, coordination and dexterity in their fingers and hands. Powerball helps to improve agility, speed, accuracy and endurance-if you can make music, Powerball will help you play better.Product Description:1.Stainless steel chrome-plated housing2.Automatic start3.Generates a weight of up to 61 kg4.10% smaller than other models5.Strengthen and repairSpecifications:Type: wrist ballFunction: Muscle relaxerName: Powerball Wrist Ball Trainer LED GyroscopeType: Sports EquipmentSuitable for: multifunctional gym, tennis, squash, cycling and rock climbingGym accessories: Yes