This is one of the best sound machines we have used. We originally received to see if we wanted to partner with them. Missy hates sharing a room with me when we travel together, so she brought it with her to drown out my snoring. Turns out – I loved it too. It uses a real fan inside to generate the white noise so it never loops. You can change the intensity and the sound by using the buttons on the machine. If you download the app that goes with it, you can also keep it on a schedule so you do not have to worry about turning off every morning. Now James nor Rebecca can sleep without it. Missy brought in her carry-on without any issues. It is not the smallest thing, but still does not take up a ton of room in your suitcase. It is well worth the luggage real estate for me!