Feature: 1. A VIVID KALEIDOSCOPE EFFECT: You can manipulate the light by refracting it, and all the sides will refract the light for more colour combinations. You can enjoy different colours at different angles, presenting you with an amazing visual feast. 2. SENSITIVE TO LIGHT: This optical glass prism refracts different light effects. With only a small amount of light, it can change the colour of the light as the angle changes. 3. SUITABLE FOR ANY LIGHT SOURCE: It can refract different colours of light even when illuminated by mobile phone flashlight, sunlight, strong torch, etc. The stronger the light the brighter the colour. 4. WIDE APPLICATION: Glass cube prisms are ideal for optics teaching, science experiments, kids science, art ornaments, photography. Meanwhile it can be used as a present for kids to explore the colourful spectrum or add effects to your photos. 5. PREMIUM MATERIAL: It is made of K9 optical glass, and six sides are polished for better refractive index. It not only reflects clearly, but also feels comfortable in your hand. Specification: Item Type: Prism Material: K9 Optical Glass Weight: Approx. 105g / 3.7oz Product Size: Approx. 25x25x25mm / 1.0x1.0x1.0in Storage Box Battery Information: Button Cell Battery, Model CR2016, 50mah (Built In). Package List: 1 x Prism1 x Storage Box With Light