The first and only high-tech instrument for automated measurement of the string tension and the playability of each tennis racket!
Delivery / Package content:
- ERT 300 in high quality case (Case 20 x 20 x 5 cm)
- Operating instructions in German, English, Français, Italiano (Download)
- DT system disc (Tension Help)
- 2 batteries (CR 2032 button battery)