Calming Natural Sounds: Available with 16 types of natural sounds, including white/pink noise, fan sound, rain, thunderstorm, forest, crickets, waves, streams, heartbeats, etc., to provide you with pleasurable auditory experiences. Timer and memory function: Three timer options are available: 30 minutes, 60 minutes, and repeat playback. The sound machine will automatically turn off when the timer ends, or it will continue looping until manually turned off. The next time you turn on the sound machine, it will remember the last sound and volume settings. Great Sleeping Companion: This sound machine helps to drown out background noise, assisting babies in relaxing. It can also alleviate adult insomnia. The natural soft sounds create a pleasant sleeping atmosphere, allowing you to feel calm and fall asleep gently. Portable and Compact: The sound machine is lightweight and small in size, making it ideal for home, office, and especially travel. Whether you are alone or on the go, let the sound machine accompany you anywhere and anytime.