Whenever we are out of sync with the day-night cycle, for example when we travel overseas or work at night, or when winter deprives us of sunlight, we feel down and tired. Pocket Sky helps adjust your body clock by suppressing the production of melatonin, a sleep hormone. Seize the benefits of biologically active light to energize yourself, lift your spirits and enjoy better sleep. This is the most natural way of enhancing your wakefulness, performance, and well-being. Pocket Sky will lift your mood and power you up in only 20 minutes a day.