Zenfone 2 Case, NuNu Asus Zenfone 2 Flip Case CONCRETE GREY with Circle Smart Window Support Function For Asus Zenfone 2 Lavish design: Premium Concrete Grey ( Built with Quick Window Feature) Stand Feature: Comfortable Viewing angle Ultra Slim Profile: Slim and form-fitted Open Design: Easy access with large opening for ports Compatible with Asus Zenfone 2 Only