DJI FLAME WHEEL F550 ELEGANT MULTI ROTOR AIR FRAME KIT ONLYFlame Wheel F550 is used in the Dji Naza Flame Wheel F550 Hex-Rotor RC Helicopter Platform (DJINAZA550), a receiver-ready hex-rotor R/C helicopter, and the Dji Flame Wheel F550 Hex-Rotor ARF RC Helicopter (DJIFWF550ARF), an Almost-Ready-to-Fly hex-rotor R/C helicopter. Specifications: Frame Weight: 478g Diagonal Wheelbase: 550mm Takeoff Weight: 1200g - 2400g Recommended Propeller: 10 x 4.5in; 8 x 4.5in Recommended Battery: 3S-4S Li-Po (Not Included) Recommended Motor: 22 √ó 12mm (Stator size) (Not Included) Recommended ESC: 30A OPTO (Not Included) Requires: 6x Electric Motors 6x ESC 6x Propellers 1x Multi-Rotor controller 1x 3S-4S Li-Po battery 1x Aircraft radio transmitter and receiver system with fail safe function. Recommended Completion Parts: DJI WOOKONG WK-M MULTI-ROTOR AUTOPILOT & STABILIZATION SYSTEM (DJIWK-M) DJI NAZA MULTIROTOR CONTROLLER (DJINAZACTRL) Dji 2212 Electric Motor (DJIMTR2212) Dji ESC 30A (DJIESC30A) Dji 10" Propellers (DJIPRP10) Dji BEC (DJIBEC)