The Ultra Violet Index (UVI) is a measure of the UV radiation level at the earthÍs surface and it is designed to indicate the potential for adverse health effects from ultra violet light. Since inception, UVI measurement has been limited to professional devices. For the first time, this vital data is available to the average person by simply glancing at your wristwatch. JDC introduces the SEAWATCH. This unique watch has a built in UV sensor which continuously displays the UVI providing the wearer with instantaneous accurate ultraviolet radiation data and itÍs waterproof! SEAWATCH alerts the user to the maximum amount of recommended UV that a person should be exposed to. The benefit is that this product minimizes the risk of skin cancer.