What are the hours of work? http://www.chris-cancercommunity.com/power-crunch-proto-whey-cafe-mocha-b01a.pdf power crunch proto whey cafe mocha  Nest Protect is powered by two processors, one of which is dedicated to the safety features, while the other handles the more complex stuff, like voice alerts and recognizing your waving gesture to hush it. While it typically gets connected with your Wi-Fi network, multiple Nest Protect units also form a mesh network to stay connected if your Wi-Fi goes down.