The difference between Lenovo notebook mouse DPI and CPI is as follows:

The full name of CPI is counts-per-inch, which refers to the sampling accuracy of the optical mouse per inch of length. For example, if the technical index of a mouse is 800CPI, it means that the mouse can feedback 800 coordinates at a moving distance of one inch, which is 1/800 inch (approximately 0.0318 mm).

Another common mouse parameter is DPI, which was first used to measure the index parameters of scanners and printers. It refers to the number of dots printed per square inch (Dot Per Inch). Among the mouse parameters, DPI represents the minimum amount of movement that the mouse can sense. 400DPI refers to the movement distance (pixel point) that the mouse can sense by 1/400 Inch, and 800DPI is 1/800 Inch. By analogy, the higher the DPI, the higher the accuracy of the mouse.

Some people think that using CPI can better express the sampling characteristics of the mouse, but in fact there is not much difference between the two. Nowadays, manufacturers generally only mark the DPI parameters. The higher the DPI value, the better the accuracy of the mouse.