IS MY RACKET STRUNG IN THE BEST POSSIBLE WAY? The ERT 300 tennis computer is a microprocessor-controlled measuring instrument which determines the stringing and playing characteristics of your tennis racket accurately and quickly. It thus makes the technology used by world-class players available to every dedicated tennis player in an easily portable format. The patented electronic measuring system has proved itself many thousands of times on tennis courts and has become known internationally through the ERT 700, ERT 1000 and ERT 4000 professional measuring instruments. Now you too can concentrate completely on the match – you will know how well your strings are performing within a minute! Benefits:   DO YOU ENJOY WINNING? Then the ERT 300 tennis computer will be your best partner: – Determine your ...

IS MY RACKET STRUNG IN THE BEST POSSIBLE WAY? The ERT 300 tennis computer is a microprocessor-controlled measuring instrument which determines the stringing and playing characteristics of your tennis racket accurately and quickly. It thus makes the technology used by world-class players available to every dedicated tennis player in an easily portable format. The patented electronic measuring system has proved itself many thousands of times on tennis courts and has become known internationally through the ERT 700, ERT 1000 and ERT 4000 professional measuring instruments. Now you too can concentrate completely on the match – you will know how well your strings are performing within a minute! Benefits:   DO YOU ENJOY WINNING? Then the ERT 300 tennis computer will be your best partner: – Determine your ...