The HoMedics Hatch The Hatch Rest (HBREST) is a small white and gray all-in-one smart sleep system that serves as a white noise machine for babies in nurseries. With a sleek design, measuring 5.25 inches in height and 4.5 inches in length and width, this model (SS-4520) weighs only 1.5 pounds, making it easy to use and transport. Its smart features help create a peaceful environment for newborns to rest comfortably.