[Compatibility] The case with pen holder is only fit for Samsung Galaxy Z Fold 4. NOTICE: Not suitable for Samsung Galaxy Z Fold 3 2021/ Samsung Galaxy Fold 2019 etc [Multi-Layer Structure Design] The Samsung Galaxy Z Fold 4 case has 4 different protective structure. Hard PC back cover gives you the smooth touch feelings without leaving fingerprints; Front Frame effectively prevents your edge from being scratched; Built-in screen protector film allows you use the phone without other extra screen protector; 360all-inclusive hinged cover protects your phone while folding without affecting free folding. [with Pen Holder] there is an exclusive pen slot on the hinge of the z fold 4 case, which is easy to carry, durable & stable, safe & beautiful. Whats more, it is easy to install and remove. [Perfect Design] Both internal and external screens of our z fold 4 case are 0.5mm higher and the camera is protected by higher fine holes. Professional hinge gives your folding edge the best protection without affecting free folding. 360 degree protection against shock, smudge and scratch. Lightweight and fit, without affecting wireless charging. Precise design ensures the accurate hole position. Suitable for various kinds occasions for both men and women.