The actual hardware, all inside that little cylinder, focuses of an HD camera (we'd guess 720p) with night vision and a wide-angle lens to see as much of the room as possible. It also has a motion detector, a microphone and speaker, an accelerometer, and a handful of air sensors (temperature, humidity, air quality). Some of those are new; the Dropcam, for example, doesn't have the air sensors. But we're most excited about the software. Here's how you set it up.