This device will allow communication between your MagnetoSpeed display and your smartphone. This will facilitate changing of settings, saving and naming of shot strings and texting or emailing shot data. Further features are still being developed. XFR will work with both Sporter and V3 chronograph displays. XFR is NOT compatible with V1 and V2 displays.
Visit this page to see phone capability. http://www.magnetospeed.com/pages/xfr