Mobile phone is more and more delicate and fragile. The traditional anti-drop mobile phone case is limited to protect the appearance of the mobile phone, and can’t guarantee the mobile phone from "internal injury". Defense Shield applies the automobile anti-collision technology to the protection of the mobile phone, and creates the Multi-ap system. Through the innovative mechanical principles, the design of multilayer dispersion absorption type anti-drop structure is adopted to reduce the direct impact force on the mobile phone. Protect your phone from the "appearance" to the "inner core".