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

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 every day which will make your hands feel less painful 3. Wrist ball hand grip enhancer hand grip exerciser relieve stress suitable for the elderly nursing treatment and rehabilitation personnel: in fact the gyro ball will not bear too much burden Can improve blood circulation on the fingers and prevent nerve damage How to use the wrist ball Step 1: Take the gyro ball in your hand rotate the core upwards and use two thumbs Rotate the rotor again and again until it reaches the corresponding elastic core position in the direction of the arrow. Step 2: Hold the wrist ball tightly then immediately release your finger from the spinner the spinner will Run at a speed of 1500 to 3000 rpm. At the same time slowly lower you