HQRP® UV Chain; Using the HQRP Circle-shaped UV chain tester will help you to protect both your eyes and skin from the dangerous effects of the Ultraviolet rays the sun emits. The device will notify you when the UV (Ultraviolet) intensity will exceed safety limit. * UV radiation can negatively affect our body causing sunburns, skin aging, and may even be one of the reasons contributing to the skin cancer. At the same time our eyes and body may not be able to determine the level of the UV intensity, especially on snowy days or when the sky is cloudy. * HQRP Circle-shaped UV chain tester is very easy to use device that will provide you information about the level of the UV intensity. Looking at the color on the special surface of the HQRP UV tester, you will always be alerted about the possible overexposure to the UV rays. * 200 days warranty!