Sturdiness: I've put these drones via their paces in many countries around the world, flying them in cold weather, windy weather conditions, and to the mouths of Energetic volcanoes. The Mavic Pro was initially fold up drone from DJI. While this quadcopter is small, it does not absence in technology. https://elliottglkrs.blogvivi.com/28729645/detailed-notes-on-how-drones-works