Duo Discus XL Electric Factory already installed air electric brake in the wings Model no. : FF-B041C Specification : Material : Epoxy fuselage/Balsa wood wings Wingspan : 4000mm Length : 1740mm Wing Area : 56 dm sq. Flying Weight : 4200g Including Retract gear: Aluminum Retract glider / Wheel 2.7" Cockpit & seat: 1set Recommend Power system:(Not included) Motor : 1200kv (Outrunner) ESC : 80A w/BEC Battery: Li-po 22.2V 4500mAh,25C Propeller : 11 x 7 Folding Propeller Retract gear: Aluminum Retract glider / Wheel 2.7\\\" Servo : Micro servo 17g x 7