Spare parts for POWERUP 4.0. 14+. IN THE BOX 2x sets spare props (right and left) 2x rubber bumper 1x Spare cross bar for aerobatic flying 1x Spare front clip Turn any paper plane into a powered, remote-controlled flying machine Use the in-app controls to loop, barrel roll and hammerhead with ease. Or hit Acro mode and enjoy your own private airshow. POWERUP almost anything. Create and test new designs from paper, light balsa wood or foam. Fly even when the weather isn’t perfect. Pit your skills (and our onboard computer) against unpredictable elements.