1.Sports toy LED light power ball 2. Weight : 350g 3. 30pcs/ctn Hotsale! LED Energy Wrist Ball With Speedometer Sport Toy Red ... powered by rotating the wrist. The faster we rotate the ball, the stronger the dynamic and torsion is produced. The ... Function:1.Perfect exercise gadget for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2. ...