Adapter to connect a TI graphing calculator to an overhead projector so the whole classroom can view your calculator screen.
This is new (still has the screen protector on it). I purchased it for my own use several years ago and then my school decided to go a different direction with technology.
Requires either the wide port on the calculator or a calculator made especially for connecting to this device. (see picture for plug type).
Make me an offer if you think my price is too high.