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. Precise measurement: measurement range: 0-150mm; resolution: 0.1mm; Accuracy: 0.2mm. Perfect and accurate measuring tool for home or DIY. Inch/mm Conversion: One button switch quickly between two units: inch and millimeter, saving you time. Made of sturdy, durable and portable carbon fiber composite plastic. Zero-adjustment function: the smart design allows you to zero-adjust with the push of a button and start a new measurement at n any point on the scale, ideal for differential measurements. Large LCD Display & Auto Shut-Off: Large, easy-to-read LCD display helps you get accurate results quickly and easily, Auto-shut off for save battery after 5 minutes if not in use.