We are all swimming in a sea of wifi and emf's.
I have had someone insist to me that my (obviously healthy & happy) birdies are suffering due to the high levels of wifi & likely high emf's in my house. Funny though, when it all goes out the birdies all act exactly the same (still happy & healthy)!
The birds in the air are flying though wifi signals and emf's. All of us living in this world are swimming in them. You can turn off your own wifi but cannot turn off your neighbors' wifi's. Would we all be healthier without them? Who knows. Some people believe so. But there is no way to prove it one way or the other. ((It is NOT like teflon, which Will harm birds.)) Your birds will not have any visible effects from wifi or emf's. I definitely live in a high-wifi and highly-wonky-emf's area, and my my birds are healthy and happy.
And as already noted above, the blinking lights will not be any problem at all for the birds.