Quanum Nova FPV GPS Waypoint QuadCopter - Speed Controller (verde chiaro)
Be carefull when you buy this item, take care of the version written on the ESC ! I have received mine in january 2014, it's version V1.6 and my copter had version V1.5 !!I have seen the discussion, and they are not the same. For me one was failed from factory, and when I replaced it, I have problems. Hobbyking should sell the same part or to warn that four should be replaced.