This is a small, portable white noise machine with surprisingly good sound. It's pretty loud despite it's small size. It's portable, fits in the palm of your hand or thrown into a bag or purse. It has some decent options for different white/brown/pink noise. It can play continuous and non-stop or on a timer. The battery charge is also pretty decent. I use this in my office for almost 8 hours 5 days a week, and maybe have to charge it once a week. The charging cord is a USB and it does not come with a wall plug (cube), so you'll need one on hand or an outlet with a USB port. 

For the convenience, it's great.