ACCURATE MEASUREMENT:Measuring range: 0 - 6'' / 0 - 150mm; Resolution: 0.01'/0.1mm; Accuracy: 0.2mm/0.01". Perfect and accurate thickness measuring tool for home/DIY measuring. Please choose stainless steel digital caliper for more accurate measurement. 4 MEASUREMENT MODES: This digital caliper can be used to measure inside and outside diameter, depth and pitch with two sets of jaws and a probe. Battery powered, comes with pre-installed battery and spare battery. INCH/MM CONVERSION: One-button quick switch between two units: inches and millimeters, definitely save your time. Made of sturdy, durable and portable plastic carbon fiber composite. ZERO ADJUSTMENT FUNCTION: Clever design allows you to zero with just the press of a button and go a new measurement at any point on the scale, ideal for differential measurement. LARGE LCD DISPLAY AND AUTOMATIC SHUT-OFF: The large, easy-to-read LCD display helps you get accurate readings. accurate results quickly and easily, auto shut off to save battery after 5 minutes if no operation.