The Lobster Elite Grand Slam 4 is a battery operated tennis ball machine which offers fully random oscillation. It has a great computerized software which is programmed to set all possible speeds, spins and trajectory combinations. The Elite Grand Slam 4 has three pre-programmed modes which simulate the most popular styles of play. The tennis balls shown in the image are not included with the machine.
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The battery does not have to be removed from the machine to be charged, there is a charging point on the machine which connects straight to the battery. You would need to move the machine to an electric point as the lead on the charger isn't very long.
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