Tennis line caller for the price of racket

To see the video click here

99% accurate, 100% trustworthy
And a lot of features:

ATTACH TO ANY NET POST Install in seconds with the smart attach.

PORTABLE, ZERO-SETUP Ready-to-use with the court auto-calibration.

KEEP ON PLAYING The battery runs 90 minutes up to 2 hours.

STREAM OR STORE VIDEO HD record: Live mode or SD card standalone.

REAL-TIME PROCESSING Instant data processing, no cloud dependencies.

STATS LIKE ON TV Get the same stats the pros use.

ANDROID AND IOS SUPPORT Compatible with any low-end phone or tablet.

CSV EXPORT Raw stats to be imported into Excel.