When editing your images on computer its important to make sure you monitor is giving you an accurate representation of what you image “actually” looks like. The Spyder 5 monitor calibrators are great tools to create an accurate color profile for your screen. This a quick process to run the software and create a profile to set your screen so you can accurately adjust your images before you print. Save time and money by having a correctly calibrated screen. Remember to adjust your screen brightness down to about 25% or so before running the calibration software. Hope this video is helpful! ShootSharper is a gear-centric site for photography reviews news and tips! http://www.shootsharper.com EDIT: I was wrong! In previous version of the Spyder “Express” you were limited to one device/screen… not so in the Spyder 5 Express. Here is a link on datacolors website to the differences in the express pro and Elite. http://bit.ly/1RJRXzs Hope this helps!