Nest Protect S2001BW Smoke and Carbon Monoxide Alarm (Battery): Rely on the calm voice of this Nest Protect alarm to alert your household in an emergency. Sync your phone with the system to receive updates, whether you're at home or across the country.

Nest Learning Thermostat — 2nd Generation: Meet the Nest Learning Thermostat. It learns from you and your home, programs itself automatically, and helps save energy when you're away. And you can control it using your smartphone, tablet, or laptop. In independent studies, the Nest Thermostat saved an average of 10%–12% on heating bills and 15% on cooling bills. Based on typical energy costs, your Nest Thermostat could pay for itself in less than 2 years. Calculate your savings here.