Polished Electronic Tachistoscope, Color : White, Packaging Type : Box, Production Capacity : Unlimited

This is a metallic exposure box with electronic timer to control the exposure time. The exposure time can be adjusted continuously from 0.1 to 5 seconds. Provided with binding posts for calibrating the exposure time setting using chronoscope. It has two card holders, one for the standard card - 3.5" X 5.5" and another for big size cards - 6" X 8". Works on 230 V AC. Supplied with Dot Cards for span of attention.
Other type of cards for span of Apprehension can be ordered extra.