The changing colors of RAINBOWSTAR create an atmosphere of fun and mystery. Let RAINBOWSTAR’s colors express your changing moods and emotions. If you are feeling happy, let RAINBOWSTAR shine pink for you. A nightlight is also built into the bottom of RAINBOWSTAR, and the soft glow of the nightlight will automatically turn on when this light senses darkness. The battery runs up to 4-6 hours. The metal exterior and transparent acrylic top and bottom create a modern and sleek design.