![BEERS Technic | ERT 300 Tenniscomputer: to measure the dynamic tension, power and control of your racket BEERS Technic | ERT 300 Tenniscomputer: to measure the dynamic tension, power and control of your racket](https://www.beers-technic.ch/img/intro/ert_racket.jpg)
BEERS Technic | ERT 300 Tenniscomputer: to measure the dynamic tension, power and control of your racket
String MD - I use an ERT 300 tennis computer to measure the dynamic tension on every string job. The ERT 300 measures the DYNAMIC TENSION DT (string bed stiffness) by electronic
![all-for-tennis.com - Beers Technic ERT 300 Electronic Tennis Computer Tension Measurer FREE SHIPPING all-for-tennis.com - Beers Technic ERT 300 Electronic Tennis Computer Tension Measurer FREE SHIPPING](https://www.all-for-tennis.com/imgs/253/253698.jpg)