Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
-It is very small, very easy to carry.
-The results are really clear and pretty accurate.
-I use it to test my sunglasses UV protection and it works very well.
-It looks good!
-When it is in contact with UV rays, the color changes really fast!
-It is really simple to use... :p
-It is a little bit long before it loses its colours...
Mine came with a little blue butterfly, it kind of looks good!
I don't use it as a cell phone strap, I bought it to test my sunglasses UV Protection!
I recommend it, you know, for people who like to see if their glasses really have a UV protection...
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