There are so many sounds whether you want nature sounds like birds, running water, waves, thunderstorms, or fan noises or even white noices there are multiple sounds of each. You can have it shut up at different time intraval or else keep it on indefinately till you tuirn it off. you can change the lighting modes, When it is plugged in you can see a red light.
All in all I am very pleased with buying this, I think $40 isnt the highest price out there for this kind of product, and since it works wirelessly and can be used as a bluetooth speaker, it is kind of worth it. Long as it stays at this price I might buy more as gifts later on down the road.