Please pay attention to the differences in measurement units. The current measurement unit may be inches, while other units may be centimeters. After all alignment operations have been performed to your desired level, you will be pleased to see that the marking workpiece falls inside the eyepiece field of view F1. Calipers with LCD or OLED screens measure the Inner/outer diameter, length, width, and depth of an object in real-time with an accuracy of 0.01 millimeters. The measurement mode can be changed from absolute mode into relative mode and also into metric/imperial. Data output functions, including USB and RS-232, ports are also provided. The basic model has an IP67 degree of protection which means it is totally dustproof and coolant resistant; industrial grade apparatus used in automotive and aerospace assembly lines are capable of transmitting essential critical Statistical Process Control SPC data in real-time through Bluetooth to midstream quality control software, and this is important in high speed assembly lines.