The paper reports on the optical switching characteristics of the fastest TN cell. The display utilizes a special superfast mixture developed by Data Images. Equipment was designed to monitor the switching characteristic from low to high temperature. The design is described in the paper. Some of the physical properties of the superfast fluid are mentioned and compared with those of commercially available fast mixtures. The D.I. superfast line of display has also ultra-thin spacing which increases the viewing angle and reduces the switching times. The display operates from -60°C to +80°C. It has a total on + off time (including delay) of approximately 20 msec at room temperature and approximately 1 sec at -40°C. This type of display eliminates the need of a heater for low temperature operation of LCDs and is very useful for wide range operating conditions.