Now you can enjoy the Surf as it meets the sand of the beach, a thunderous Waterfall cascading over a rock ledge, or the refreshing sound of a spring Rain.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 DS-600 is completely portable.When standard electrical current is unavailable, it can be operated with four AA batteries (not included).Take the DS-600 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. Features: Solid State Electronics. Volume Control. Battery Operable. Quality Construction. One Year Limited Warranty. Made in the U.S.A. 6 Base Sounds: Lake Shore, Rain, Country Eve, Surf, Brook, Waterfall.