Improve your hand and arm strength with this self-starting power ball equipped with a counter. This wrist ball functions as a muscle relaxation apparatus and is perfect for those looking to strengthen their hand and wrist muscles. Its design makes it an ideal wrist exerciser, and it comes with a model number that ensures its quality and durability. The power ball's function includes promoting blood circulation, enhancing grip strength, and reducing stress on the wrist and forearm muscles. Its compact size and portability make it easy to use anywhere, whether at home or at the gym. With its innovative self-starting mechanism, the power ball is simple to activate and start training your wrist and arm muscles immediately. This is the ideal equipment for individuals who want to improve their grip strength, build muscle, and relieve stress in their hands and forearms.