Amzer Pudding Soft Gel TPU Skin Fit Case Back Cover for ASUS Zenfone 4 A400CG - Retail Packaging - Black The matte finish promotes grip ability and minimizes sliding on flat surfaces. Provides excellent protection for your ASUS Zenfone 4 A400CG. Precisely engineered includes custom cut-outs to fit your ASUS Zenfone 4 A400CG perfectly. Plug your charger, cable or headset without removing the case. Easy installation, just snap on your device without any tools, also very easy to take off, no tools needed.