Magic Color Changing LED Digital Projection Alarm Clock Starry Night Effect Create a amazing night sky in your room with this projection alarm clock Projector display time or date and project a starry night sky onto the walls and ceiling of any room LED light flash in 3 colors - blue, green, red; Colors change circularly. When put in dark area, the effect is more attractive Simple design, easy to use, amazing effect Powered by 3 x AAA batteries (not included)