Used to operate a Romulan view screen by Dr. Bashir on Romulus in the episode"Inter Arma Enim Silent Leges". Two of these were used back to back on either side of the view screen, a total of four in all. Flip the first image sideways and you will see that the prop screen matches. In addition, these were also used singly as door key pads, you can see them in the background of the last two screencaps alongside the doors.
