★ 6 light sources: D65, TL84, UV, F, CWF, U30; Voltage:110V/220V (Optional, by default, we will ship according to the voltage of your Country) | ★ Automatically save all records of the contents after power-down | ★ Permanent record of each separate source name, frequency and switch using times | ★ Can test metamerism (same color different chromatogram) | ★ CAC-600-6 Color Assessment Box is widely used in textile, printing and dyeing materials, visual assessment of color fastness, color proofing, color identification and fluorescent material.