The powerful combination of innovative PA66 nylon and highly elastic silicone 🤝 🤝Gives F618 both tough 💎 and flexible 🌊 unique physical propertiesRealize the battery interface radial, axial 360 ° all-round flexible floating 🔄Whether you are traveling through the city streets in the small potholes and bumps on the wayor exploring the unknown and complex natural terrain outdoors 🚵♂️ 🚵♀️