Beautiful music box sound repeats seamlessly. It supports various noise effects, visual effects that respond to sounds, and digital photo frames. Sound effect 1. LP Noise - Classical Noise 2. White Noise - Irregular White Noise 3. Pink noise - noise of uniform hearing 4. Alpha wave - EEG in resting state 5. Delta Wave - EEG in Deep Sleep Sound visualization effect 1. Dream 2. firefly 3. stars 4. flame 5. Film Timer: 30 minutes up to 10 hours Lifetime listening sleep music from fetuses and children, adolescents, adults! It can be used as a meditation, when you can't sleep, prenatal care, lullaby, or as a frame with background music.