(p.s. individual two litter robot 3 and equally of them are not Doing work as predicted, not often detecting my cats and sometime just freeze in middle… experienced the wifi board installed and was never able to connect so the app is non-exist for me…) 1st off, we observed it https://clayc464lac2.therainblog.com/32226549/cat-litter-smell-control-can-be-fun-for-anyone