Compatibility: This iPad Pro 12.9 Case can be used for iPad Pro 12.9 6th generation & 5th/4th Gen (Model: A2378/A2461/A2379/A2462/A2229/A2069/A2232/A2233) & iPad Pro 12.9 2018 (3rd Gen) (Model: A1876/A2014/A1895/A1983). Access to all buttons and ports aligned perfectly. Attention: Not compatible with 12.9'' 2nd and 1st Gen Built-in Pencil Holder: Tightly hold your pencil, supports the Pencil (2nd gen) magnetically pairing and charging without taking off the case Flexible Back Cover: The back cover is made of flexible TPU materials, different from plastic shell which is easy to crack Auto Sleep/Wake: 0.1S quick response to auto sleep/wake your device for power reduction and reduce the electricity consumption by 50% Ergonomic Typing and Viewing Angles: Make your wrist and posture more comfortable, without any pressure