The DS-600A is completely portable. When standard electrical current is unavailable, it can be operated with four AA batteries (not included). Take the DS-600A wherever you go: hotel room, camping, even in the car. The timer can be set to turn the unit off after sixty minutes if desired. Now you can enjoy the Surf as it meets the sand of the beach, a calm, gentle rain with the rhythm of a distant thunderstorm, or the steady, constant background of "White Sound". Relax to the sounds of a babbling Brook, the gentle lapping water at the Lakeshore, or the sounds of crickets and spring peepers on a Country Eve. The sounds on the Marsona DS-600A are your favorite and most requested sounds. Whether you want to mask the noise with the "white noise" effect of the Rain or White Sound selections, or enjoy one of the four other sounds of nature; you will quickly find a favorite sound on the Marsona DS-600A.