JIN BD Wrist Trainer Ball Auto-Start Wrist Strengthener Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Wrist Bones and Muscles With LED light, black

Brand: JIN BDColor: BLACKFeatures: Automatic start design, need to push the core in the direction of the arrow, start by the internal spring, very easy and convenient. When it rotates, the cool colored lights inside will light up. It can kill time and add fun while restoring muscle soreness. Without any strange vibrations, it can rotate for a long time without worrying about it stopping when moving. The convenient design can be carried anywhere, whether in the office, gym or at home, it can be used as a toy to decompress at any time, and it can also exercise arm muscles. Wrist ball can promote blood circulation and increase the strength of fingers, wrists, hands, forearms, biceps, triceps and ligaments and shoulders, and restore muscle strength. Details: Benefits of the wrist ball 1. Wrist ball is good for warming up your hands, wrists, shoulders, forearms, biceps and upper limbs 2. If you use the computer or play the piano for a long time, you can play this ball for a few minutes eve