Features： 1、Fast and Effective: With this wrist resistance trainer, you can train your wrists and shoulders with short, effective workouts. By ensuring continued muscle and flexibility growth in your forearms and wrists, you can see significant improvements in muscle strength, flexibility and blood pump. 2、Respond to Muscle Injuries: Carpal tunnel and repetitive stress injuries are common when using a computer for long periods of time. It is for rehabilitation, relieving tension in the arms, neck and shoulders and helping to restore your body to health. 3、Speed Selection: There is a strong response at high speed, the faster the speed, the greater the power and the greater the effect of the exercise. At lower speeds, it is also a very effective tool to soothe and restore sore and damaged limbs. 4、Safe and Portable: This power wrist strengthener ball is equipped with a wrist cord, safe and convenient, when using the wrist cord, to avoid excessive force with out. 5、Exercise Parts: Wrist trainer ball is for training forearms, biceps, triceps, shoulders and wrists, at the same time, it also enhances the grip of the fingers, which is a good helper for fitness. Specification： Item Type: Wrist Trainer Ball Material: ABS Color: White Applicable to the Crowd: Sports enthusiasts: make it more tense and powerful through wrist ball exercise. The public room crowd: through the wrist strength ball exercise can keep away from sub-health or relieve the discomfort brought by the mouse hand. School students: promote bone development to enhance grip strength, wrist strength, arm strength, finger flexibility. Wrist injury: through the wrist strength ball exercise, accelerate the flexibility of the healing hand injury. Package List： 1 x Wrist Trainer Ball 1 x Lanyard