Wrist Trainer Ball, AutoStart Spinner Gyroscopic, Arm Strengthener, for Stronger Muscle and Bones Workout, Pack of 2 (Color : Red)

☞[Automatically start the design]: The operation is very simple, just push the core in the direction of the arrow, which is activated by the internal spring. Please wear a special wristband during exercise to ensure that you will not lose it due to excessive force.
☞[Exercise your wrists and hands]: The hand enhancement ball is the centrifugal force generated by the interaction between the rotation of the wrist and the internal rotating core, which can maintain the high-speed rotation of the core, promote blood circulation, and increase the fingers, wrist, hand, forearm, biceps, triceps, and ligaments And the strength of the shoulders, restore muscle strength.
☞[Make Exercise & Add Fun]: Novelty design with LED lights, which is fun to see how fast you can get it spinning. Cool LED lights inside will light up while spinning, no battery needed, powered by rotating the wrist. Rehabilitates sore muscles, Kill the time & Add fun!