The Phantom 1/2 Vision Motor with clockwise threading (CW) is for propellers that use the same rotational direction. The Phantom 2 Vision has four motors total, two clockwise (CW, Part 6)The ESC v2.1 for Phantom 2 from DJI is an electronic speed controller (ESC), a flight system component that acts as an interface been the flight controller and the motors. The ESC translates inputs from the flight control system into a quantity of power delivered to each motor, thus allowing the aircraft to maneuver.COMPONENTES ELECTRONICOS DE SEGUNDA, PROBADOS Y EN PERFECTO FUNCIONAMIENTO, NO TIENE GARANTIA NI SE ACEPTAN RECLAMOS O DEVOLUCIONES.