![BEERS ERT 300 Tennis Computer- A Must Have for any Racquet Stringer & Tennis Enthusiast | The Tennis Depot Blog BEERS ERT 300 Tennis Computer- A Must Have for any Racquet Stringer & Tennis Enthusiast | The Tennis Depot Blog](https://thetennisdepot.files.wordpress.com/2014/03/kgrhqzhge2fw7bksybn5c0dfbr0_12.jpg)
BEERS ERT 300 Tennis Computer- A Must Have for any Racquet Stringer & Tennis Enthusiast | The Tennis Depot Blog
String MD - With the ERT 300 Tenniscomputer, you'll know when it's time to restring your racquet. The display shows current stringbed stiffness (dynamic tension), indicating the power and aggressiveness of play
![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
![AllThatRacket on X: "Finding it a real challenge to get the current tension on my Power Angle Pro racquet. Just can't get the claws in the ERT 300 to grip it well AllThatRacket on X: "Finding it a real challenge to get the current tension on my Power Angle Pro racquet. Just can't get the claws in the ERT 300 to grip it well](https://pbs.twimg.com/ext_tw_video_thumb/1430874256435343362/pu/img/9ORtle4fuaRZjh60.jpg)