Use of impact-resistant STS-316L metal allows the combination with stable dual Gorilla glass. The back cover is made of silicon and assures a good grip. The on/off switch with fingerprint sensor is also located there. The back cover is easily removed, giving access to a changeable battery as well as a micro-SD slot. The setting for a selfie can be selected for an 80-degree or a 120-degree angle. A second screen displays basic information such as date and time, while the main display is switched off.