Very nice. I have the Hangar 9 Angle Pro incidence meter. It contains a similar digital inclinometer. The inclinometer can be removed from the rig and used separately to check control surface throws and also to check if other components are level. However, I think this item has been discontinued as I have not been able to find another.
Robart has an incidence meter but no digital inclinometer with it. It uses a needle and a scale and a bubble level.