Spectracal Calman 5 is the fifth generation of the Calman software series, designed to calibrate a wide range of displays, including LCD, LED, OLED, and plasma screens. It works by measuring the color output of a display and then adjusting it to meet precise standards. This process involves generating a color calibration profile that corrects any inaccuracies in color reproduction, ensuring that the display shows content as intended by its creators.