E310 (4*Motor/ESC; 4 pair props; Accessories pack; Updater for ESC) The E310 series tuned propulsion system is the first power solution of its kind for the multirotor industry. It brings greater aerodynamic efficiency and higher thrust-weight ratio, while increasing reliability, stability and agility. With more efficient motors and intelligent ESCs, this package offers you more information while flying and makes each flight last longer. Built for multirotors with a diagonal base of 330-350mm. Built for multirotors weighing 1-2.5kg. Made by DJI Innovation