A. This is a 1.6 - inch digital caliper, also known as an electronic vernier caliper or 100mm caliper. It is a micrometer and digital ruler measuring tool. It has dimensions of 245×80×12mm and is made of 150mm plastic material. B. It can measure internal and external dimensions relatively easily and accurately. C. It uses a linear capacitance measurement system. D. It can be zeroed at any position. E. It is equipped with a small locking thumb screw to lock the jaws in a certain position. F. Its basic measurement functions include measuring internal diameter and external diameter. G. It is equipped with a relatively large and easy - to - read LCD display. H. The resolution is 0.1mm/0.01 inch. I. The accuracy is about 0.2mm. J. The dimensions are 245×80×12mm. K. The power supply requires a 1.5V battery (not included). L. The weight is 53g. M. The package contents include 1 digital electronic caliper (without battery).