Most people leave the house at one temperature and forget to change it. So the Nest Learning Thermostat learns your schedule, programs itself and can be controlled from your phone. Teach it well and the Nest Thermostat can lower your heating and cooling bills up to 20%.

We all know why smoke alarms are torn off the ceiling or missing batteries: because every time you make stir-fry, the smoke alarm cries wolf. Or just as you’re falling asleep, you hear a low-battery chirp. They’ve become annoying. And that’s a safety issue.