Feature: 1. K9 OPTICAL GLASS: RGB optical prism polyhedra is made of k9 glass, which is not easy to fade and scratch resistance. It can manipulate light through light refraction to form kaleidoscopic patterns. Exquisite and unique design 2. EASY TO USE: If there is no sunlight, you can use a flashlight. Just place the prism where the light can get it and a iridescence will appear on the opposite wall! 3. TABLE DECORATION: The delicate decoration of multi dimensional cubes on any surface or tabletop exudes a delightful optical entertainment effect, allowing you to enjoy a variety of colors from different perspectives, even when you are in the same place. 4. PHOTOGRAPHY PROPS: Glass cube prisms are ideal for teaching optics, science experiments and photography, suitable for children to explore the colorful spectrum or add effects to your photos. 5. COMPACT AND PORTABLE: Measuring Approx. 25x25x25cm / 9.8x9.8x9.8in, it is small. Easy to carry, you can put it in your pocket or backpack. Even if you put it on your desktop, it won't take up too much space. Specification: Item Type: Color Cube Prism Material: K9 Optical Glass Size: Approx. 25x25x25cm / 9.8x9.8x9.8in Organizer Battery Information: Button Battery, Model 2016, 50mah (Shipped with Built In Battery) . Package List: 1 x Color Cube Prism 1 x Storage Box Note: Manual measurement please allow some error.