Dental Tooth Color Comparator Digital Shade Guide CorrectorDental Digital Shade Guide Photoelectric Tooth Color Comparator. High Accuracy. Multiple algorithm to get the true color. Strong resistance to light interference. Little affected by temperature, even the ambient temperature is low to 5C, it can still be used. Overview Multiple algorithm to get the true color Strong resistance to light interference Little affected by temperature, even the ambient temperature is low to 5C, it can still be used Built in