SLEEP TIMER: Play continuously or set the optional sleep timer with three settings: 45m, 90m, or 8 hours. Easily tailored to your bedtime or nap routine.EFFECTIVELY CANCELS NOISE: Beloved by generations since 1962, is the trusted leader in white, pink and brown noise machines. The features our signature sound the soothing ambient sounds of rushing air. gives you the rich sound in a portable unit to mask noises that disturb sleep and interrupt concentration.HEADPHONE JACK & USB: Use the device without disturbing your partners sleep with the handy headphone jack. Powered by USB. PLEASE NOTE: Wall power adapter plug is not included.26 SLEEP TRACKS & SLEEP TIMER: Plays 26 curated sleep sounds including 9 robust white noise options, 8 sleep songs, and 7 nature sounds. Also includes fan sounds and Dohm-inspired tracks.COLOR CHANGING NIGHT LIGHT: Cast a glow with the multi-colored and customizable night light ring. Choose from a warm, amber glow night light or adjust the color and intensity and create a calming ambiance with a spectrum of colors.