Multiple Application: White noise machine helps you fall sleep and effectively cover up destructive or startling sounds, suitable for adults, kids, babies, and elder. You can take the portable sound machine wherever you go, which is great for travel, home and office. 10 White Noise Tones: Wind, Birdsong, Frogs and Crickets, Crickets of The Night, River, Fetal Heartbeat, Waterfall, Sea Waves, Wind, Snow and Fire, Thunder. 8 Musical Tunes: Octave Box, Wind Chimes, Piano, Water Drops and Time, Quiet Harp, Sea and Seagull, Guitar, Harp. 8 Colors Night Light: Light Red, Purple, Green, Pink, Yellow, Blue, White, Warm Green. When switch to the warm green light, color will cycle change. 4 Timer Options: Unscheduled, 30 minutes, 1 hour, 90 minutes. Function: Sound machine for sleeping has multi-range volume level and memory function. It not only allows you to adjust the volume as necessary, but also automatically restores your previous volume, sound and timer.