G***j Verified Buyer

Very sensitive. Even on cloudy weather the color starts to change.

5
X***k Verified Buyer

received in 15 days; it reacts with UVB too, not only UVC

5
E***j Verified Buyer

Novosibirsk came to a 5 and a half weeks! Tests work!

5
L***i Verified Buyer

As mentioned in the description.

5
S***m Verified Buyer

It works OK

5