I was given the opportunity to try out the  Big Red Rooster White Noise Sound Machine, and it works really well. It has white noise which sounds like static, rain, thunderstorm, brook and ocean. All sound fairly realistic. The volume can be turned up and down and it can actually get really loud. The only con is during the thunderstorm, when the thunder rumbles it vibrates the unit and makes a rattling sound if the volume is up real loud. It comes with a plug or you can use batteries. I would recommend it. [This review was collected as part of a promotion.]