Hobbypower F550 6-axis Multi-rotor Hexacopter Frame Airframe Kit Integrated PCB Wiring F550 is a multi-rotor designed for all pilots for fun or AP. With DJI WKM or NAZA autopilot system, it can achieve hovering, cruising, even rolling and other flight elements. It can be applied for entertainment, aerial photography, FPV and other activities Made by advanced engineering material, super strong & smooth Kit (need assemble by yourself ).New design PCB board special for F550,support standard flight controller like MK, KK, FF, MWC, APM Model: F550