Patented Solar Energy & Sun UV Monitor,the new gift for Solar Energy & Sun Protection Industry! If you've ever wondered how fast your skin cells are being roasted while sunbathing in the open, here's the perfect gadget for you. The center of the Solar Energy & Sun UV Meter can change series of color to reflect the ultraviolet intensity of the sun. As it turns darker, that's your cue to slap on more sunblock lotion and bring out the solar energy equipment for use. Although theproduct isn't something you would associate with being professional, it does have one redeeming quality. It lets you know the best time to juice up your solar charger or use your solar energy equipment,and remind you to take corresponding skin care actionaccording toSun UV changing; This product can really check sun UV radiation low,mid,high or highest level refer to WHO Regulations.The center area of theproduct can change series of color according to sun UV radiation, higher the sun UV radiation, deeper the color change, compare the color change to the 4 standard colors(low, mid, high, highest) around and you can see low, mid, high or highest level of solar energy or sun UV radiation; This product is very good marketing premium for solar energy equipment & Cosmetics industry.You can use it to check sun energy and sun UV radiation to decide if you can use the solar energy equipment and make sure you can use solar energy equipment in proper way and take anti-UV action in outdoor activitiesas; China Patented and CE&ROHS Certified.