Accurate and useful gadget
This thing works as described. I was pretty skeptical at first, but after checking the readings against UV index websites, it seemed to be accurate. One thing to note is that the settings for cumulative exposure are very sensitive - I'm pretty pale and burn easily, but I ended up setting it to 6 or 7 because lower levels it would alert me that I'd met my total exposure within a few minutes on a sunny day. It definitely takes some time to figure out what your level of tolerance is and to set it accordingly. Overall, I'm very happy to have it and it's simple to use.<br /><br />For those reviewers who say it doesn't work because they tested it through glass - UV waves do not penetrate glass, so you're going to get a UV index of 1 inside a car. This shows that it's working properly, not a flaw.
Rating: 4 stars