Features:Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection.Used as a teaching or research toolBeautiful appearance, can be used for decorationCan also be used in photography, which can produce a good filter effectThe product is equipped with a cool black gift box. After opening the gift box, the built-in light will be opened, colorful light will appear, and the light will be extinguished when closedSpecification:Material: K9 optical glassSize: 23 * 23 * 23mm / 0.9 * 0.9 * 0.9inPower supply: 1* cr2450 button batteryPackage list:1 x Optical Glass Prism