Specifications Large easy-to-read digital LCD display 360 degrees rotating bezel Dual readings in inch and millimeter with an electronic display Simple one button calibration procedure Output jack allows data transmission. Product Description The Johnson Level Digital Bore Gauge is useful in measuring the inside of circular objects and other inside dimensions. It features a large 2-3/8" diameter easy-to-read digital LCD display. The bezel (control panel) rotates 360° that makes it easier to read at any angle. It has simple one button calibration procedure and display that shows readings in inch and millimeter. The Johnson Level Digital Bore Gauge comes with an output jack that allows data transmission and this data can be used by a variety of peripherals for analysis, data collection, and hard copy documentation. It includes the shaft and 2"-6" measuring head, various extension posts, spacers, 2" extension, 2 3V CR2032 lithium batteries, hard case, and instruction manual. It comes with 1-year warranty. In the Box Johnson Level Digital Bore Gauge Shaft and 2" - 6" measuring head 2" extension posts, spacers 2 3V CR2032 lithium batteries Instruction manual, hard case 1-year warranty