Modern interpretation of the magic lantern. Once activated, this feature allows you to project stars onto the children's bedroom ceiling. It's ideal for creating a starry night atmosphere in the nursery. You can choose from up to four pre-installed lullabies. You can also wirelessly stream your own music or other audio files via your smartphone or tablet. Cry detector: The night light detects your child's crying and automatically turns back on to soothe them. While the child continues to sleep, the night light conserves its battery. This night light is equipped with a battery that has a capacity allowing for a runtime of five days with 30 minutes of use each day.