Relax and Sleep Relax and sleep allows you to choose from a list of many ambient sounds that include thunder, stopwatch, white noise, ocean, sea, birds, rain, crickets, frogs, water, mechanical noises, nature and much more. You have the option of changing the track volumes and create your own unique relax melody as well. You can preset, turn on the count down counter, use the alarm clock with it and control the fading in and out.