4. As its name suggests, it has two cameras: A forward facing 1080p camera for visitors, and a downward facing 720p camera, so you can see if any packages have been left at your doorstep. It also has a 110 dB alarm, 2 way talk, and the ability to record your own greeting. 6 x 1. 88 View at eBayRecommended Retailer$189View at Google Store$229View at Walmart?Nest's doorbell cam produced the best looking video we've yet seen from one of these devices, and its microphone and speaker were excellent, too. It can also recognize people's faces, and announce them when they come to your door. While it needs a hardwired connection, it continuously records video, so you'll never miss an event. You can also set up specific zones, so you'll only be notified when a person or object appears in that area of the frame. While you'll need to subscribe to the Nest Aware service starting at $5/month to get all of its features, they're worth it. 05 x 2. 50 x 1.