20, 30, or 45-minute sunrise gradually wakes you up naturally with light, so you feel refreshed. You can choose the final light intensity and add one of the wake-up sounds. Touch-sensitive snooze button. You drift off to sleep as the light gradually dims. Choose a sunset of 20, 30, or 45 minutes and listen to one of the sleep sounds. The sunset can optionally end with the light off or as a night light. It mimics the colors of a real sunrise and sunset using mixed LEDs and also serves as a dimmable multi-purpose bedroom light. Light-sensitive, self-dimming display for nighttime. 9 sleep/wake sounds including white noise. Proven to help with SAD/winter blues. From Lumie, the specialist in light therapy and inventor of the wake-up light.