
The Next Generation in Tension Tracking Technology
For Tennis Players at Any Level

Your Tension. No Guessing.
Every tennis player knows that strings lose tension over time. But how do you know when it’s time to restring? Or how close your strings are to breaking? For most players, it’s a guessing game. You wait until your racquet doesn’t feel right, your performance starts to change, your arm starts to hurt, or your strings finally snap.
That’s why we created the RTT--the Real Time Tension tracker.
The RTT gives you a live reading of your string tension, right from the bottom of your racquet handle. By monitoring how your tension changes over time, you can better understand the condition of your strings, gauge when they may be nearing the end of their life, and make more informed decisions about when to restring.
Why Guess?
Tennis is a game full of variables, adjustments, and unknowns. Your string tension shouldn't have to be one of them. With the RTT, know your tension in real time. Take the guesswork out of your strings and focus on what matters most, your game.

Meet The LITT Team
Steve Jackson
Steve has been the Director of Tennis at the California Tennis Club in San Francisco for the past 12 years. Before that, he served as Director of Tennis at the Tiburon Peninsula Club for 10 years. A former Division 1 player at Fresno State University, Steve competed on the professional tour from 1993 to 1997. He is widely regarded as one of the top tennis coaches in the country, having developed hundreds of players who’ve gone on to compete at the collegiate level (Divisions 1, 2, and 3) and on the ATP and WTA tours.


Matthias (Mat) Moran
Mat is an experienced engineer and entrepreneur with over 30 years in the tech industry. Originally from the UK, Mat is recognized for his leadership in engineering, innovation, and business in the Bay Area. A passionate recreational tennis player, he met Steve through their shared love of the game.
FAQ
Questions
How do I insert my RTT?
Will my LITT device work for different rackets?
How does LITT know that my strings are wearing out?
How do I reset LITT after I have my racket restrung?
Should I put LITT in my racket only when I get new strings?
Will my LITT device work with all kinds of string (poly, gut, hybrid, synthetic gut)?
How long does my LITT product last?
How do dampeners impact RTT?
Answers
You start by removing the “Trap door” on the butt cap of your racket. Using the small screw driver provided in the RTT package, place the screw driver into the opening in the butt cap of the racket, and then pop open the “Trap Door”. Once the “Trap Door” is removed, line up the RTT in place of the Trap Door”, and push down on the RTT device until you feel it clicks into the butt cap.
LITT is a highly advanced vibration detector / monitor which has exclusive firmware that is able to measure the impact of vibration when the ball makes contact with your strings. It measures the amount of vibration that is going from the racket handle to a person’s wrist, arm, elbow and shoulder. As your strings age, vibration increases and becomes more powerful on your wrist and arm. LITT measures this increase in vibration.
Dampeners reduce string vibration which mainly just changes the sound produced when you hit a ball. They also make it more difficult for your RTT to measure the vibration and they
slightly change the frequency. If you use a dampener then make sure to use it all the time
otherwise the RTT may become confused by the changing vibration frequency. Also, when a
string breaks or when you re-string the racket, the RTT may not detect the change as quickly
as it would without a dampener.
When you take your racket to the stringer to get your strings replaced ask your stringer to reset LITT. If the stringer is not familiar with LITT follow these steps to reset the device:
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Hold the LITT logo button down for 3 seconds
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Take your finger off
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Hold the LITT logo button down again for 3 seconds
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Wait for the logo to light up red and then transition to orange, and then to green. This indicates that the LITT device is reset and ready to go.
Yes. LITT products take vibration readings to calibrate the health of your strings. When you play tennis for the first time after implementing LITT in your racket LITT creates a baseline for vibration based on hitting that day, so if you put a LITT product in a racket with dead or used strings it will not be able to calibrate and will be working off of an incorrect baseline.
Yes.
The battery for a LITT product should last one year to 14 months depending on how many times your press the light indicator button to check your string health. Under normal use and normal checking of your racket it should last a year depending on how often you press the button.