The Sidewinder 4 is Castle’s first platform running CRYO-DRIVE™ technology which reduces operating temperatures in all applications and is 1:10th scale surface. CYRO-DRIVE is a potent combination of software enhancements and precision fluid dynamics. The new case is designed specifically for maximum airflow from the huge 30mm fan included with the Sidewinder 4. These changes result in cooler ESC temperatures, increased runtime and power handling. These improvements mean you can gear more aggressively for more speed and harder/longer runs. And of course, it is still waterproof and compatible with the optional Castle Link USB the Castle Link Adapter and Windows PC or B-LINK™ Adapter and iOS or Android App.