Warms a bowling ball to a precise temperature (135 F) but not higher, so ball is not in danger. Ball rests on a specially designed stand inside the machine – the stand catches drips of oil for easy disposal. Heated air circulates so that rotating or turning the ball is not needed. Typical usage is 1 hour per ball. IMPORTANT NOTE… NuBall is built for 110V power only. If 220V is the power available, a converter is required which will handle up to 500W output.