The Mitutoyo 500-195-30 AOS Absolute Digimatic Caliper has a measuring range of 0-4" with .0005" resolution. Includes a Depth Bar. Mitutoyo's absolute Digimatic Caliper is the next generation of electronic calipers. It keeps track of its origin point once set. Whenever turned on, the large LCD displays the actual slider position ready to start measurement. No more repeated zero setting is necessary with the absolute encoder technology, as well as no more concern for over speed errors.