Product Description: Simple Buildable Time Saver to Optimize Tight Tolerance ---vernier caliper cuts out all of the hassles to double your chances of measuring outside, inside, depth and step in an exact way. Intuitive Solution ---It does not lose the accuracy even after moving it from min to max a few times in a row at different speeds and steps. Seamless Metric / Inch Conversion ---Handily covert between metric measurements and customary measurements with decimals. Two Sets of Finely Razor-Sharp Corners ---Internal / external diameter measurements with two sets of finely razor-sharp corners perform subtle and nuanced touch. Buttons on the Caliper ---Get good quality rubber buttons that will not get wedged and stuck if you push them at an angle. Specification Color: Black Material: Plastic Range: 0~150mm/0-6inch Accuracy: 0.2mm Resolution: 0.1mm Power Supply: SR44/LR44 1.5V or CR2032 3V batteryBatteries are included in the product Auto Shutdown Time: 5.5min Influence of Humidity: Up to 80% coolant proof Operating Temperature: 0~+40 Storage Temperature: -20~+70 Package Includes: 1 x Digital Vernier Caliper