Tennis Warehouse

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For use with the Dyna Power Ball, this very cool little RPM meter attaches directly to the Power Ball and offers a number of different informative functions.
Features:
  • Instant Speed Change: indicates your current level of RPM's.
  • Highest RPM: this mode will automatically store the highest RPM acheived.
  • Physical Strength Index: Gauge your arm strength!
  • Note: For use only with Dyna Flex Power Ball Gyro

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