I expect to be learned that I have nothing to worry about. Okay, I hear you and in another 20 years we'll have conclusive proof one way or another. BUT, suppose I would like to minimize the electrosmog in my house, specifically my always-on router broadcasting on the 2.4 and 5 GHz n-bands to serve my (only) four wifi devices. My other dozen or so devices are ethernet-based. I know (esp. in Europe) there are on-demand baby monitors so mother and baby aren't sleeping next to always-on wifi routers every night. Is there any similar technology out there for a router that listens (receives) for devices requesting it, but only transmits upon demand? If not, would turning off SSID broadcasting lessen the transmit activity of a standard router? I have dialed down the power output of the router and situated it in the best location, but I'd like to have it available 24/7 (no hard-scheduled off periods) yet broadcast-free when not being accessed for data by any of my devices. That's the case probably 16 hours a day, but not the same 16 hours a day.