... LED: 6pcs a grade LED Item No.:868N Product naem:Wrist ball with LED Description:Sheel material: A ... the device, it is powered by rotating the wrist, and the speed of rotation can reach over ... 12000 R.P.MFUNCTION:-Perfect exercise gadget for sports like golf,tennis,squash,cricket,baseball,bowling,basket ... speeds,it will burn.-Do not use this product persons who with heart conditions of any description ...