Mitutoyo 0-4" Digital Caliper Specifications include... 0-4" / 100mm Measuring Range 0.0005" / 0.01mm Resolution 0.0005" / 0.01mm Repeatability + 0.001" Accuracy 0.075" Round Depth Bar Features include.... Large and clear LCD readout. The ZERO/ABS key allows the display to be Zero-Set at any slider position along the scale for incremental comparison measurements. This switch will also allow return to the absolute (ABS) coordinate and display of the true position from the origin point (usually jaws-closed point). With thumb roller. Supplied in fitted plastic case. Display: LCD Length standard: ABSOLUTE electrostatic capacitance type linear encoder Battery life: Approx. 3.5 years under normal use Function Origin-set, Zero-setting, Data output, inch/mm conversion Alarm: Low voltage, Counting value composition error.