Color Change Magic Bulb Digital Alarm Clock with Calendar and thermometer (White) This LED color change alarm clock will help relieve your pressure and fatigue through changing the color of light automatically and is ideal for home use. Magic bulb shaped desk clock LCD screen powered by 2 x AG13 batteries (included) Powered by 4 x AAA batteries (not included) 7 colors of light change automatically;helps relieve your pressure and fatigue