This noise machine has a unique amount of sound effects to help me sleep at night. It's the perfect size, portable for travel and can be powered either by cord or batteries. I think the best part of this product is the ability to set a timer and shuts off the sound effects after a given time. It's a good product, just a tad bit on the soft side volume wise, and the overall product looks sleek. [This review was collected as part of a promotion.]