Product_description: ['A digital caliper equipped with standard outside and inside jaws. Hardened stainless steel construction and equipped with ABSOLUTE System scale for error free, high-speed measurement Conventional Digital Measurement - The ZERO/ABS button allows the display to be Zero-Set at any slider position along the scale for comparison measurements. This button also allows return to the absolute (ABS) mode for displaying the true position This caliper features the new Advanced Onsite Sensor (AOS) technology which offers improved measurement dependability by increasing resistance to harsh workshop conditions The new electromagnetic inductive sensor repels dirt, oil and water that can cause false readings ABSOLUTE Digimatic Measurement - The ABSOLUTE system. All Mitutoyo measuring instruments with this logo incorporate the ingenious ABSOLUTE measurement system. An ABSOLUTE scale only needs to have the origin position Made by Mitutoyo - Japan Functions - Origin-set, Zero-set, Inch/mm, Automatic, Low Voltage alarm, Counting Value Composition Error alarm This is the upgraded unit 500-196-30 to replace the older 500-196-20 Fine adjustment with thumb roller and blade style depth bar Accuracy - ±0.02mm / ±.001" Resolution - 0.01mm / .0005" Repeatability - 0.01mm Battery