My new Serene Evolutuon white noise machine is now my favorite part of my bedtime routine. I have to make sure I turn it on before bed as I love listening to it while I fall asleep or if I want to relax or unwind after a long day of work. There are 36 different sounds to listen to. It has a timer that can shut off after 30, 60 or 120 minutes. You can even leave it on all night if you want. This is a small speaker so would be easy to take with you anywhere you want to listen to it.