This t:Holster is a plastic case with 360 deg 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.