This Digital Indicator is used to accurately measure small linear distances in mechanical and industrial processes without reading errors. The tool can check the tolerance level when inspecting process of machine part. This is an tool for mechanical, industrial processes and laboratory use. Features - Color: Shown in the pictures. - Material:Aluminum alloy. - Size: Approx. 12 x 5.5 x 4cm/ 4.7 x 2.2 x 1.6 inch (LxWxH). - Aluminum Alloy Digital Dial Indicator-Large LCD display with 4 digits, be used to accurately measure small linear distances in mechanical and industrial processes without reading errors. An tool for mechanical, industrial processes and laboratory use.- Measuring range from 0 ~ 12.7 mm. High resolution up to 0.01 mm (0.0005").- Included Rear Cover-Hole Diameter: 6.5mm, It is removable and can be used on different magnetic base holder stand.- Inch/Metric Conversion-Switchable between mm and inch, Suitable for all kinds of measurement- Zero Setting, with Convenient Ports-RS232 Data Output Interface and SR44 battery compartment. East to replace battery.Specifications- Measuring Range: 0 ~ 12.7 mm.- Resolution: 0.01 mm (0.0005 inch).- Response Time: 0.5 m/s.- Operating Temperature: 0 ~ 40 C (32 ~ 104 F).- Storage Temperature: -20 ~ 70 C (-4 ~ 158 F).- Relative Humidity: 80% R.H.- Material:Aluminum Alloy.- Power: 1 x 1.5 V SR44 Button Cell Battery (Included).