Our iPad holder features a 1" ball and socket connector on the back. This can be used to mount your iPad in many different environments other than your Standzfree stand. Compatible with all generations of iPads. This is only the holder, which comes standard with Standzfree. With the new 1" ball, this holder can be used to convert from the former iProp stand. This is included with Standzfree and is not required to be purchased separately.