![]() weather it’s a wrist, hand, finger or forearm injury or stiffness and discomfort in these joints - then powerball is for you. Great for rehabilitation - at low speeds, powerball is highly effective in injury rehab and pain relief. ![]() ![]() precisely monitor your highest speeds, strength & endurance gains. ![]() Precise fitness tracking - powerball 280hz pro is fitted with a 4-mode acura 2.0 lcd speed meter that is 100% battery-free powered only by the magnetic energy of the spinning rotor. ![]()
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