This is one of the lightest & smallest theodolites available. Its many versatile functions can be selected by setting internal switches. FeaturesSmall and Compact4 x size AA batteries are used for operation ApplicationsBuilding operations and civil worksInterior finish workSurveying at forests and mountains Specifications Telescope(erect) Power : 20xAperture : 30.5mmResolving Power : 4.5"Field of View : 1deg20minStadia : 1:100 Horizontal / Vertical Circle Diameter : 53.4mmMinimum Reading : 1' Level Sensitivity Plate Level : 90"/2mCircle Level : 10'/2mm Optical Plummet Power : 3xFocusing Range : 0.5mm...Infinity Dimensions / Weight H198 x W125 x D130mm / 1.8kg Display LCD : segment(H/V) Power Supply AA type x 4 Temperature Range -20degC...+50degC Interface RS-232C Brochure 2.3MB