Projector directed at distance for projection of tests, intended for recognition of the vista. (Machine-translation by Google Translate, not legally binding)

摘要

Remote-controlled projector for projection of tests for sight recognition, characterized in that it contains a large number of vignettes arranged on a remote control and remote control, and because in order to command on the progress a keyboard is provided, in itself known, which reacts by simple touch. (Machine-translation by Google Translate, not legally binding)