This t:holster is a plastic case with 360-degree rotating clip that provides flexibility to wear the case vertically or horizontally. The case was designed like a cell phone case so that you can perform all the day-to-day functions like viewing your screen, accessing the Wake button, changing a cartridge, and charging your pump all without taking it out of the case! The t:holster is compatible with t:slim, t:slim G4 and t:slim X2 insulin pumps.