Feature: 1. RGB Cube Prism: RGB optical prism cube is made from k9 optical glass material, which is not easy to fade and scratch resistant. It can manipulate light through light refraction to form a kaleidoscope like pattern. Even if you are in the same place, you can enjoy various colors from different angles, a truly great visual experience. 2. Rainbow Delight: If the sun isn't shining, you can use a flashlight. Just position your prism so that the light shines through it, and there should be rainbows dancing on the opposite wall. 3. Decorative Optical Entertainment: The exquisite decoration on any surface or table of multi dimensional cubes can exude a pleasant optical entertainment effect, everyone will enjoy and be fascinated. 4. Compact: Size is 20x20x20mm, it's small. Easy to carry, you can carry it in your pocket or backpack. Even on the desktop, it doesn't take up much space. 5. Widely Used: Glass cube prism ideal for teaching of optics, science experiments, and for photography. Suitable for children to explore colorful spectrum or to add effects to your photos. Specification: Item Type: Color Cube Prism Material: K9 Optical Glass Weight: Approx. 88g / 3.1oz Storage Box Battery Information: Button Battery, 50mAh (Shipped with) Product Size: Approx. 20x20x20mm / 0.8x0.8x0.8in. Package List: 1 x Color Cube Prism 1 x Storage Box