Calming Nature Sounds: There are 16 natural sounds to choose from, including white/pink noise, fan, rain, thunderstorm, forest, cricket, ocean waves, stream, heartbeat and more for your pleasure of hearing. Timer and Memory Functions: Three timer options: 30 minutes, 60 minutes and repeat. The white noise machine will automatically turn off when the timer goes off, or it will loop until it turns off. Next When the white noise machine is turned on, it will keep the last sound and volume settings. GREAT SLEEP COMPANION: The sound machine helps cancel out background noises and helps babies relax. It can also relieve insomnia in adults. Natural soft sounds create a pleasant sleeping atmosphere, allowing you to feel calm and fall asleep gently. Portable and compact: The white noise machine is light in weight and small in size. Great for home, office and especially travel. When you are alone, let the white noise machine accompany you anytime, anywhere.