check more detal ..here
I got the bug to buy, but it was not what the image is. The filters, which do not have the little red, and it shows you when the filter is at the end of its life cycle. I returned it, and the distributor of my money, but it was still a great effort. Again, please learn from my mistakes. Do not buy this product because it is what is in the image.
P.S. I did some checking and I can say, PUR, these special filters. The new indicator has no life. If so, this is the most stupid, they can do.