This is the visor that emits safe rays of therapeutic light to counteract the effects of Seasonal Affective Disorder, jet lag, and fatigue. Worn once a day for 20-30 minutes, the rays emitted by the visor are precisely aimed to land on the lower retina, simulating the experience of looking at a blue sky without the harmful effects of ultra violet or infrared light. A built-in timer alerts the user to the end of the session, which can be programmed to one of three intensity levels. Rechargeable battery provides up to 3 1/2 hours of operation at maximum intensity level from a five-hour charge. (2 1/2 oz.)