Material: thick aluminum alloy frame, stable and durable, strong sense of quality, ABS strip aluminum sheet, no rust, sun protection. Internal compartment: EVA cotton + pearl cotton compartment, the surface is flat and beautiful, easy to mark and write, strong bearing capacity, not easy to deform or shake, and protect the phone. Details: Transparent window handle, easy to take, safety lock design, high-quality hardware lock, make your phone more secure. Phone Manager: Let the phone no longer be cluttered, with a variety of specifications, which can almost meet most of the phone sizes on the market. Transparent window, with number, easy to take. Wide use: This is a great mobile phone storage box, pearl cotton to fix the mobile phone, protect the mobile phone from wear and tear during the moving process.