The Nest thermostat is a smart home device that learns from owners’ behaviours and adjusts itself accordingly to maximise energy efficiency. After installation, users can adjust temperature settings manually— or via a smartphone—until the thermostat learns their preference. The device contains temperature, humidity, near-field activity, far-field activity, and ambient light sensors. It can provide a monthly home report, detailing energy usage and stocks. Potential flaws include incompatibility with some heating systems, installation difficulty, and privacy concerns.