Premium Metal Aluminum Case Full Metall Protective Case Miui Xiaomi 4 (Mi4) (Red Silver) 1.Premium Metal Aluminum cover case for MIUI MiaoMi 4 (mi4) 2.CNC machine making,ultrathin cover case,Full metal cover ,very protective case, 3.High tech double hard anodized ,colorfull design,Metal brushed finished. 4.Easy setting,Plus the Round buttom above, Push the cover out 5.Put you phone in,fist step is aim the lower cover, and then focus the above round button side to close