top of page

The ERT300 tennis computer is the only microprocessor worldwide for automatic measurement of string bed stiffness, as well as playing characteristics of any tennis racquet. This makes the technology of world-class players accessible to every dedicated tennis player, stringer and coach - all in a small device.

The patented electronic measuring system has proven itself thousands of times and is the international standard. This is the latest version, formerly branded under Beers Technic, used at many prestigious tournaments around the world.

Now you can concentrate on your game - no need to worry about your strings anymore!

The ERT300 comes in a soft case with a DT-System-Disc [Tension Advisor] and two batteries. Made in Switzerland.

ERT300 Tennis String Tester