• Measurement range from 0 to 150 mm (0 to 6 inches) • Large LCD display for quick and accurate reading of results • 4 measurement modes: internal diameter, external diameter, depth, and step • Zero setting function at any position for comparative measurements • Quick conversion button between inches and millimeters • 0.1 mm resolution with an accuracy of ± 0.1 mm • Made of lightweight and resistant carbon fiber • Automatic shutdown after 5 minutes of inactivity to save battery • Includes an LR44 button cell battery for immediate power