Can be used with Mychron 4 and Mychron 5 or Stand Alone, GPS Sold Separate (M4 only, not needed on M5 gauges). SmartyCam HD Rev 2.1 has been designed for motorsports with a single purpose: providing great videos that include all the technical information that will help you improve your performance. All this in the most robust and reliable system ever. In its new version, the electronics/mechanics have been further improved, and SmartyCam HD is now even easier to manage.