This is the outdoor flight review of Walkera QRInfra X Quadcopter that has built in ultrasonic sensor and a couple of infrared sensors that offer obstacle detection and smart obstacle avoiding during flight. Though the system is not perfected or matures yet, but I believe its very good first product from walkera offering such features. Enjoy this flight and we will post indoor flight soon. Comments and feedback welcome at [email protected] , [email protected] and [email protected] Don't forget to visit , and Subscribe to and Hey Check out my Highly Recommended Products at Kit here: