Features: brand new and high quality Beautiful and unique design, the same environment, viewing from different angles, there will be completely different color rendering. Optical glass RGB prism, there are four lights, any one of the white light of the illumination surface, from the remaining three light out of the three primary colors of red, green and blue, respectively called three base light. Can be used as a teaching tool or research and decoration. The cool black gift box has built-in lights, which are turned on and off, and turned off and off, and the colorful colors are instantly presented. The blue light inside the gift box, when opened, the eye-catching effect is immediately presented. A great gift for boyfriends, girlfriends or kids. Specifications: Material: Optical Glass Size: 68x63mm/ 2.67x2.48 in Package Includes: 1x Color Prism( battery included) note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.