Multi-Function: 2-in-1 Design,Come with Ocean World & Star Moon 2 projector films,Install one of the two films,it is a beauty Starry / Ocean night light projection lamp.Remove the films and close the top cover,it is a little bedside night light; Kindly note that do not use the two projector films at the same time,Please take out 1 before use,it would be great for projection effect. Easy Control:There are 3 Buttons under; Right button:Power Switch ; Middle button:Light Color Conversion Button, to change the 8 kinds of different lighting effects,turn off the multiple light over 3 Seconds ; Left button : Sun light mode and Light Rotation Button, rotating by pressing once ,press twice to open the warm light,press 3 times to turn off rotation,press 4 times to turn off the warm light. Quiet & Relaxing: Quiet,Rotates Silently ,Projects Star Moon Space/Undersea world pattern on the wall or Ceiling, move around you,it looks like you stay in the ocean /Star Sky , the changeable romantic nightlights will ease your bad mood or mind, you can enjoy the relaxing starlight in a quiet environment. Power Supply: USB cable (with package ) or 4 Pieces AAA batteries (not included) ,Warm tips: Please dont use the batteries and USB cable at the same time, or it may damage the product.