Datacolor Spyder4Pro S4P100 Colorimeter for Display Calibration Automated Color and Brightness Calibration Full-spectrum color sensor Single sensor calibrates multiple displays Improved accuracy and stability - The fourth-generation Spyders have double-shielded color filters for even closer match to CIE color standards and improved long term stability. Average accuracy is up 26% and consistency between Spyder units is 19% better. Fast Re-calibration Assistant - The ReCAL feature makes it quick and easy to recalibrate your display to compensate for changes over time.