The makers of the highly-touted Nest Thermostat have just announced pre-orders for the next smartphone-connected product for the 21st-century home: the Nest Protect smoke and carbon monoxide (CO) alarm (US$129).
Like the Nest Thermostat, the Protect isn't the cheapest product in its category, but it's certainly the most intelligently designed. It comes in two colors -- black or white -- and two models, one that is wired into your home's AC circuitry and another that runs on batteries.
Unlike the cheaper models that chirp incessantly when the battery runs down every few months, the Nest Protect battery version runs on 6 AA cells for several years. The wired version feature
