Intro, setup and flight of Richie 4D-V4 4DRC Drone - YouTube
4DRC V4 Drone with 1080P HD Camera for Adults and Kids, Foldable Quadcopter with Wide Angle FPV Live Video, Trajectory Flight, App Control,Optical Flow, Altitude Hold and 2 Modular Batteries : Amazon.co.uk:
Drone Blog: 4DRC V4S [Richie] Drone Set Up | Richie Drone | Dronescend