Then the ERT 300 tennis computer will be your best partner:

– Determine your optimum racket stringing
– Ensure that your tournament rackets have the same durability at the
   net and identical playing properties
– Reliably determine when your racket needs to be restrung so that you
   can continue to build on your high level of performance
– Enjoy playing tennis without arm and back complaints

As you will know best, you need to be able to trust your own equipment on the court. It is only when you are sure that you have the perfect tools that your head is clear to think about the big points and that you can concentrate fully on your opponent and the game.

Enjoy your victories!