Wakes you up in a natural way, by a gradual increase in light output. Light gradually increases over a 30 minute period before your set wake up time. Light falls on your eyes and positively affects your energy hormones, preparing your body to wake up. Clinically proven to make waking up more pleasant.FM radio function. Alarm clock. Combined reading light and wake up light in one. Snooze function. 2 natural wake-up sounds.Mains powered.