First of all it has the best processor snapdragon 821, it works on os-v7.1(nougat).
talking about the protection it has corning gorrila glass 4, it has no card slot, it comes in 32gb and 128gb,
it has the best camera ever Primary-12.3 MP, f/2.0, EIS(gyro), phase detection & laser auto focus, and dual tone led flash, you can take video of 2160p at 30fps and of 1080 @ 120fps, it has fast charging, the best thing in this phone is its look and design, and its a most durable phone because of its design