Accurate Measurement: Measuring range: 0 - 6''/ 0 - 150mm; Resolution: 0.01inch/0.1mm; Accuracy: 0.2mm/0.01". Perfect and accurate caliper measuring tool for home/DIY measurement. Please choose Stainless steel digital caliper, more accurate measurement 4 Measuring Modes: This digital caliper can measure inner diameter, outer diameter, depth and steps through two sets of jaws and one probe. Powered by pre-installed and backup batteries Inch/mm conversion: Quickly switch between inches and millimeters with one key, definitely saving your time. , durable and portable Zero function: Smart design, just touch a button to zero and start a new measurement at any point on the scale, ideal for differential measurements Large LCD Screen and Auto Off: Large, easy-to-read LCD display helps you get accurate results quickly and easily, and automatically turns off after 5 minutes of inactivity to save battery