、Simulate the real starry sky, will blink the stars, bring you a different dream feeling. ; 2、8 kinds of nebula effect display, the speed of change can be adjusted, the brightness of the nebula can be adjusted. 3、The brightness of the stars can be adjusted, the speed of change can be adjusted. 4, you can show the stars or nebulae alone. 5, 2 gear timing, 45 minutes, 90 minutes. 6, multi angle arbitrary rotation, a variety of environmental switching, easy to move and use.