ERT 300 Tenniscomputer by Beers Technic
What you get
ERT 300 in soft case of high quality (soft case 20 x 20 x 4 cm)
Manuals in English, German, French and Italian
DT-System-Disc (Tension Advisor)
2 Batteries (CR 2032 coin type)
What it does
The ERT 300 Tenniscomputer calculates the actual tension of the strings in your tennis racket. Simple to use, the ERT will enable you to get the optimal performance from your strings and improve your game. Simply clip to your racket strings, wait a few seconds and the device will display the Dynamic Tension (DT), the style of play best suited to the tension and when it is necessary to restring.