Bent Pin CC3D Open Source Flight Controller 32 Bits Processor for Multirotor Quadcopter QAV250 FPV250 with Protect Yellow Box Powerful STM32 32-bit microcontroller running at 90MIPs with 128KB Flash and 20KB RAM. 3-axis high-performance MEMs gyros and 3-axis high-performance MEMs accelerometer. Bent Pin CC3D Flight Controller for small space in racing qaudcopter like QAV250 etc. Tiny 36*36mm 4 layer PCB for superior electrical noise reduction and flight performance.More RC racing Quad-copter product is provided by Crazepony in Amazon.Bring your eyes into the sky and racing like a free bird, enjoy the ultimate first person view experience. 24 hours online services.30-Days Money Back Guarantee,12-Months Warranty.