also has two raised flaps 82 that are positioned to interlock with the smaller diameter arcs 43 of the face plate the knife edges 45 of arcs 43 will slide under the flaps 82 they are positioned so that one flap 82 is above the point of rotation and one flap 82 is below the point of rotation when the device is in the horizontal orientation to support the device in both directions this design is illustrated in fig1 preferably the slots and flaps are punched and stamped into sheet metal that forms the back cover 80 as the device 50 and back cover 80 rotate the flaps 82 will be moved to the sides of the point of rotation and thus will not interlock with the face plate when the device is in the vertical orientation this movement is shown in fig2 24 in which the wall plate is invisible the device 50 is attached to the wall mount 10 in the vertical orientation by placing the device slightly above the wall mount the user then lowers the device 50 onto the wall mount 10 where the mounting horns 31 will be captured by the corresponding slots 81 on the back cover as the device 50 slides downward the lower blades 45 will also partially engage with the flaps 82 in.