Key FeaturesLightweight, molded-foam construction AS3X® System provides outstanding stability and smoother flight3-channel control for easy-flying and friendly soaring characteristicsContoured spinner with folding propeller (installed)One-piece, removable wing with carbon fiber supportE-flite® 8.5mm x 23mm coreless brushed/geared (installed)SpektrumTM DSM2®/DSMX® 5-Ch UM AS3X Receiver/Servos/ESC unit (installed)E-flite 1S 3.7V 150mAh 25C Li-Po battery (included)E-flite USB Li-Po charger, 300mA (included)Included 1S Li-Po battery provides long flight times on a single chargeIdeal for outdoors and larger indoor flying sitesNeeded To Complete- 4+ channel DSM2- or DSMX-compatible transmitterVideo Overview OverviewThe E-flite® UMXTM Radian is a powered sailplane that packs all the simple fun of the larger ParkZone® Radian into a much smaller package that"s an absolute delight to fly. AS3X® technology gives a pilot the feeling of flying a much larger glider especially outdoors because of its renowned ability to smooth out the effects of wind and turbulence. Its distinctively curved wing delivers outstanding lift and impressive glide ratio using 3-channel control simplicity. The lightweight brushed power system requires just a single-cell Li-Po battery to provide excellent launch performance and long flight times. Plus the one-piece wing can be easily removed and stored in the handle-equipped box making your ability to soar through the clouds as convenient as can be. You"ll be in the air in no time thanks to great features like:Folding Propeller For maximum glide efficiency, the ESC is specially programmed to work with the folding propeller so it opens quickly and folds back to streamline the airframe. Removable Wing With the removal of just two screws the fuselage and wing can be separated for easy transport and storage within the custom packaging provided. Long Flight Times The included E-flite 150mAh 3.7V 1S 25C Li-Po battery can be charged with the provided charger