This baby sleep sound machine is designed for mothers to calm the baby's mood. It can shine and sing, featuring lovely style. By adopting natural ABS material and food-grade silicone which is healthy, environment-friendly material and non-toxic, this unit is safe for baby to gnaw. Turning on the light with one key, helping users get rid of the night. The light is delicate and can protect user's eye thanks for the selection of high quality LED lamp beads, colorful lights can be achieved.