Unique design: The edges adopts R-angled transit design to reduce stress concentration during falling, and it is not easy to produce debris splashing after collision Optimization of drop resistance and protections performances: lightweight and durability, with excellent performances Precised mold: The component is high precised in mold opening and is perfectly pair with the fixed holes of the gimbals shaft and motor, avoiding gimbals shaking or motor resonance abnormalities after assembly Lightweight composite component: The lower shell adopts PC structure, which is lightweight while maintaining shock strength Heat dissipation: The lower shell is pre installed with a heat dissipation air duct guide grooved slot to ensures that the heat dissipation efficiency of the ESC electronic control board and battery compartment is consistent with original factory, avoiding overheating and performances degradation