These projector lights shine stars onto the walls and ceiling. You can easily switch between different star colors with the touch of a button: rainbow, orange, green or blue. When set to the timer function the projector light turns off automatically after 30 minutes. Your little one can fall asleep underneath a lovely starry sky. Specifications: Dimensions: 5.1 x 5.1 x 3.5 inch Timer function: 30 minutes Material: ABS Batteries required: 3 x AAA 1.5 V (not included)