Features: 1. Wooden base, the base is disc-shaped, stable and not easy to fall 2. Temperature change detection function 3. Different weather will produce different crystal changes 4. This transparent solution consists of several chemical substances in a glass container. 5. It can predict the weather, can also be used as an art decoration. 6. On sunny days: the filling is on the bottom layer and the upper liquid is clear 7. Sunny to cloudy: the filling of the bottle floats and stratifies 8. Cloudy: the filler in the bottle will float more turbid. Specification: Condition: 100% brand new Weight: 110g Approx Size:7.5*6cm/2.95*2.36inch Material:glass Blue:white,blue Package list: Glass bottle*1 Instruction manual*1 Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1、1.Wooden base, the base is disc-shaped, stable and not easy to fall 2、2.Temperature change detection function 3、3.Different weather will produce different crystal changes 4、4.This transparent solution consists of several chemical substances in a glass container. 5、5.It can predict the weather, can also be used as an art decoration.