Duo Discus XL Glider W/ electric brake Factory already installed air electric brake in the wings Model no. : FF-B040C Specification : Material : Epoxy fuselage /Balsa wood wings Wingspan : 4000mm Length : 1740mm Wing Area : 56 dm2 Flying Weight : 2800g Recommeded Power system:(Not Included) FF23-01 Cockpit & Seat Retract gear: Aluminum Retract glider / Wheel 2.7" Micro servo:17g X7