One mode: Slow Color Change--It has a very calming effect. Just press the small, safe button on the side and let the relaxing begin. LED Light Up Super Soft Pillow comes with 3 Replaceable AA Batteries (Which can be accessed through a small and safe zipper pocket on the side of the pillow.) BATTERIES DO NOT COME ALREADY INSTALLED TO ENSURE LONGEST POSSIBLE BATTERY LIFE. NOTE: Interior material holding in fluff made of 100% Polyster. Not machine washable, spot clean only. Dimensions: 1 sq. ft.