Measuring range from 0 to 150mm, resolution of 0.0005"/0.01mm Selection between inches and millimeters, internal and external diameters can be measured Locking wheel for the measuring rail, large LCD display for easy reading On/off switch and automatic shut-off when not in use, battery indicator Hardened stainless steel, included is an aluminum storage box, LR44H battery (1.5V) NOT included