Q: How Do Zelocity™ Golf Performance Monitors Work?
A: Zelocity™ is the golf industry's only true ball velocity measuring device. Zelocity™ uses Doppler radar to emit radar pulses which creates a radar field. As the golf ball travels through the radar field, it bounces impulses back to the monitor, which measures the ball's actual velocity, spin, and launch angle. Zelocity™ does not calculate measurements by comparing to pre-stored data like other devices do.

Q: Why is Zelocity™ Radar Well-Suited for Monitoring Golf Performance?
A: Using radar, Zelocity™ monitors are immune from typical problems of monitoring golf performance. Zelocity™ radar:

• Works in any and all lighting and atmospheric conditions
• Works for right-handed and left-handed golfers
• Can be used anywhere, anytime
• Works outdoors on the range or indoors in as little as 12 feet of hitting space
• Is completely portable
• Works without need for calibration
• Sets up simply, quickly
• Is reliable and accurate since data is measured, not estimated

Q: How is Ball Speed & Spin Rate Related to Distance?
A: Ball speed is the most influential factor on how far the golf ball travels. Spin rate of the golf ball is a direct derivative of ball speed. Some devices claim to measure spin rate but actually calculate it from pre-stored data for each club. If you were to set those devices for a 5 iron, but hit a ball with a driver, the spin rate would be completely inaccurate.

Q: Why is Club Head Speed at Impact Important?
A: Zelocity™ sets the standard for measuring club head speed by measuring at impact. The readings are both accurate and repeatable from swing to swing. Other devices measure club head speed at different points in the down swing before impact, which gives different and inconsistent readings.

Q: How Does Zelocity™ Measure Golf Shot Distance?
A: Based on the radar signal returned from the ball in flight, Zelocity™ measures actual distance for any club. You do not have to pre-select a club number. It does not have pre-stored data for different numbers of clubs like other devices. This prevents any pre-determined results.

Q: How Can I Use Readings from the Zelocity™ Golf Monitor?
A: Professionals and serious golfers use Zelocity™ monitors every day in a wide variety of ways:

•  Measure Distance Between Clubs
The distance you hit each club should have a consistent yardage between them. Use Zelocity™ to measure your yardage gap by averaging 10 shots with your 3 iron and your pitching wedge. Then calculate the average yardage gap between those two clubs. Next divide that average by 7, (8 clubs minus 1 - number of gaps). This gives you the average yardage gap between each club. Now hit 10 good shots with your 4 through 9 irons. Check to see if you have the same average yardage gap between all clubs. If not, then your lofts should be measured and adjusted to produce the same yardage gap.

•  Measure Spring-Like Effect on Drivers
Measure ball velocity from one driver to another, and determine which one has a greater C.O.R. (coefficient of restitution). This will determine which driver hits the golf ball the farthest.

•  Measure and Compare Today's Hot Golf Balls
Measure the ball velocity of different golf balls to see which one goes the farthest. Match golf balls to drivers for the best combination.

•  Measure Power Transfer Ratio
The ball speed divided by the club head speed expressed as a percentage is referred to as the Power Transfer Ratio Percentage (PTR%). This ratio indicates how solidly the ball is struck, i.e., how much energy is transferred from club to ball. Zelocity™ gives a true and repeatable PTR% because it accurately measures both the ball and club head speeds.

•  Measure All Wedges
Zelocity™ measures all wedges. You can accurately measure the distance you hit each wedge with 1/2, 3/4 and full shot swings. Knowing these distances is important for improving your scoring.

•  Compare Launch Angle, Spin Rate Combinations
In addition to ball velocity and club speed, Zelocity™'s PureLaunch Launch Monitor measures backspin and launch angle. This allows equipment fitters and serious golfers to find the combination of club speed, launch angle, and spin that optimizes distance.