1. 20 Types Soothing Sounds - Preset 20 genuine licensed sleep music, taken originally from the natural, including White Noise, rains, storms, campfire, ocean, clock ticking and more, Perfect for relaxation and meditation, helps faster and more natural sleep.2.RGB/Warm Night Light -Warm Night Light and RGB Mood Light. Warm night light helps you to sleep tight and the RGB Mood light can make the machine decorates your room.3. Auto-Off Timer & Memory Function Built-in timer can be set for 30/60/90 minutes, the track and volume can be also remembered when you reboot the machine.4. Convenient Travel Design - Dual power supply modes: USB Power Supply (cable included) / 18650 rechargeable battery power suppky(not included). Also equipped with earphone slot when you do not want to disturb others.