Dell U2713h 27" Monitor & Perfectlum Calibration Software (Including Spyder4 Colorimeter) Dell UltraSharp U2713H 27" LED Backlit LCD Monitor, 2560x1440 Resolution, 1000:1 Contrast Ratio, 350 cd/m2 Brightness, USB 3.0/HDMI/DisplayPort/DVI-DL PLEASE PAY ATTENTION, to request a TAX REFUND, you need to provide me with your tax exempt certificate. PerfectLum Calibration and QA software for DICOM GSDF, DIN 6868-57, AAPM TG18, IEC, JESRA X93 conformance. Datacolor Spyder 4 colorimeter for automated color and brightness calibration Read more about calibration and QA software PerfectLum here: http://qubyx.com/us/medical-display-software