DataColor SpyderCheckr Color Calibration Card DC-SCK100 is the smarter color reference! Every camera is different, but the DataColor Spyder Checkr gives you consistent, predictable color right from the start. This camera color calibration system allows photographers to color calibrate their camera, perform precision in-camera white balance, and record known-color samples. DataColor SpyderChecker Color Card has 48 spectrally engineered, scientifically formulated color patches in an sturdy, eco-friendly design, and comes with easy-to-use calibration software. The color patches are based on real-world colors - such as green grass, blue skies, and a wide variety of skin tones - and reflects light in the same manner as the real-world color it's based on. Flip the DataColor SpiderCheckr Color Card over for gray space white balance.