UV Sensor card (UV sensor card)

UV (ultra violet) sensor card This product adopts the latest photosensitivity technology together with the nano technology. Uncover this card under sunlight about 10 minutes, which can indicate the intensity of the ultraviolet ray fast & accurately by color changing. The darker the color is, the stronger the sunlight intensity. According to this card, it? easy to decide when it? the best time to enjoy the sunlight, when we should have a suntan lotion or some other measures, when we? better stay at home to avoid light. it is the best promotional items for the cosmetics, pharmacy products, health products, beverage, beer and red wine, travel service agency, school, bank and telecom etc.