I think you put too much trust in technology. I have used baby monitor for a short time, but I have never ever walked out of the house with one - if my baby cri

I think you put too much trust in technology. I have used baby monitor for a short time, but I have never ever walked out of the house with one - if my baby cries I want to be able to go to it as fast as I can - so even if my baby monitor is not working I will hear the baby, just a bit later maybe. So the devices described in the article is great, it can show me that baby is crying, not only using sound, but also I can use it to ping me in a visual way - which I always missed from any baby monitor.