Samsung Galaxy Z Fold 4 Case with Pen Holder & Changable Panel - MintDetachable Module Design: Multi functional and detachable activity module which supports viewing stand function and stylus pen function. Both the functions can be interchanged just with a slide of the part. Armor material PC Frame which provides full body protection. Invisible Stand & Stylus Pen: Equipped with invisible hidden stand module which provides a perfect viewing angle of the big screen and pen slot module with pen to draw or write on both