The RingO holder is a case that protects the tablet's corners and back panel from scratches, and holds the device in place when mounted. Openings for the dock connector, lock key, volume controls, and camera are provided, so the tablet's operation is not impeded.
Depending on the thickness of your headrest's posts, the Vogel's car mount can feel a bit loose. (At least, that was the case in our 2012 VW Beetle test vehicle.) However, pushing the headrest to its lowest position helps hold everything in place.
Finally, the holder and the car mount are locked together using the RingO connection. From its perch at the top of the seat, the iPad is easily accessible and can be viewed hands-free from the back seat.
The RingO mount uses a pair of clips that hold the round post into the round hole on the back of the holder. Users are able to freely rotate the mounted iPad 360-degrees for portrait or landscape viewing. However, there is no vertical adjustability, which would do a lot to reduce glare on the glossy iPad screen.