How can I configure my wireless power switches to default to on after power outage?
I have no personal experience with ETEKCITY. However, based on a quick, non-scientific, perusal of their web site, I get the sense of "pretty web page selling cheap junk". Not that I am against cheap junk per se - I often go that direction myself, for certain products. But for controlling 120V equipment, I tend to prefer the better stuff. The rules are a bit different (for good reason) for devices hardwired to your electrical system, and, partly as a result of the R&amp;D and testing required, they tend to be more long-term feature complete, reliable and safe.

I would look at Leviton or Lutron or another manufacturer that specializes in electrical equipment, not a catch-all "USB mag-stripe reader, blood pressure monitor, digital scale, back massager, air mattress, etc." company that happens to have some WiFi controlled plugs too. (I have no problem with a retailer (online or bricks 'n mortar) that sells "everything under the sun". But a manufacturer can't possibly specialize in everything.)

Then you can check the online manuals and if they don't have enough details you have a reasonable hope of contacting someone who can answer your specific questions.