Feature: 1. Vivid Kaleidoscope Effect: You can manipulate the light by refracting the light, all the sides will refract the light to get more color combinations, different angles to appreciate different colors, presenting you an amazing visual feast. 2. Sensitive to Light: Just a little bit of light will refract different light effects, as the angle changes, the color of the light effect changes. 3. Suitable for Light Source: Mobile phone flashlight, sunlight, strong flashlight, etc. can refract the color, the stronger the light the more vivid the color. Small size, refracts brilliant light. 4. Wide Application: Glass cube prisms are ideal for optics teaching, science experiments, children's science popularization, art ornaments, photography; as a present for children to explore the colorful spectrum, or add effects to your photos. 5. Durable Material: Cube optical prism is made of K9 optical glass, six sides are polished for better refractive index, clear reflection and comfortable and moist feel. Specification: Item Type: Cube Prism Material: K9 Optical Glass Storage Case Battery Information: 50mAh 2016 Button Battery (Shipped with Built in Battery) Size: Approx. 20x20x20mm / 0.8x0.8x0.8in. Package List: 1 x Optical Glass Prism1 x Storage Case with Light Note: All data are measured manually, and there are certain errors in the measurement results.