Sleep soundly with the Beurer WN50 White Noise Machine. The WN50 provides soothing and consistent sounds for a great night s sleep. The unit features adjustable volume control as well as 6 peaceful sounds including rain oceanside heartbeat summer?s night song birds and stream. There are 3 timer settings (15 30 and 60 minutes) for you to choose from and 4 non-slip grips to prevent sliding on surfaces.