This noise machine has 36 sounds abailable to select and is super portable!  I have used it in my office at work and it really helps to filter out the noise of the officemate who works in the room behind me.  It is also great to keep in your RV so that you can block out the noises in the campground so that you can get a great night's sleep!  Super cool machine to have on hand and I especially love the nature sounds and the flute music!  There is a sound for everyone on this machine.