Reception of the box and its components on time. Everything is nickel. Now it will take me a lot of hours of testing to get them to fly stable that chopper. The app works on Android without worries. Rather dedicated to indoor flight, the helicopter will fly off in calm weather and exposure to sunlight (infrared) outside. Attention of the connection, max 6 meters. The camera also works up to its number of pixels, no HD, Maoists for what it is doing, .....