This sound machine is the perfect size to just sit on your nightstand or to pack in your suitcase for those noisy hotel hallways or highway noises.  With six different sounds ( I like the thunder and rain) and a sleep timer setting it is the perfect machine to help you achieve a good nights sleep.  It can be plugged in to the wall or 3 AA batteries will run it where power is not easily accessible.   Small but stylish, easily portable - perfect! [This review was collected as part of a promotion.]