1; polymer RF back frame, the signal strength is not reduced
2; oversize frame window
3; laser engraving LOGO
4; unique combination of whole body connection structure
5; stainless steel screw fasteners
6; CNC machining aluminum power button
7; modular frame may correspond to future upgrades
8; aside headphone hole, the sound hole, and charging port position, the various functions easily control!
9; stainless steel screws