Tesseract is solid and made of resin.We made three versions. 1.Glass base: Tesseract doesn't glow,the base is luminous, and lithium battery is built in the base. The light is 4 kinds of colors (blue, purple, green and red) automatically play in turn, can not fix the color, the night effect is cool.The base size is 2.4''x2.4''(6cmx6cm). 2.wooden base: Tesseract doesn't glow,the base is luminous, powered by USB interface, without built-in lithium battery. The light color is fixed to blue.The base size is 2.6''x2.6''(6.5cmx6.5cm). 3.Built in battery version: This version has no base,tesseract glow.Tesseract is internally illuminated and uses a CR2032 battery.13 kinds of light colors can be changed by remote control.And you can set the brightness of the light. Please tell me the type you need!