Hobby-Ace MINI CC3D NANO Openpilot Flight Controller for QAV250 FPV Racing Multirotor New designed ,smaller than the original official Openpilot Mini cc3d flight control, volume is reduced by one third, lighter weight, only 4 grams, fit smaller through machine! Fly any airframe from fixed wing to an octocopter Tiny 4 layer PCB for superior electrical noise reduction and flight performance. Powerful STM32 32-bit microcontroller running at 90MIPs with 128KB Flash and 20KB RAM. More RC racing Quad-copter product is provided by us in Amazon.Bring your eyes into the sky and racing like a free bird, enjoy the ultimate first person view experience.