1. Quatity: Love Mei Brand.2. Function: Shockproof,Dustproof,Anti Scratch.3. Feature: Brand Waterproof Shockproof Aluminum Case Cover.4.Material:Aluminum Metal Alloy+Silicon Gel.Note: you can use it when you live in Rainy day, snow day,but you cann't use it under water , that's means it cann't take photo / calling / video ect under the water.so please considering more before buy.thanks!!!