Google Nest Hello lets you know who’s there, so you never miss a visitor or a package. It can tell the difference between a person and a thing, then alert you. And because it’s wired, it streams 24/7, so you can check in anytime. Or go back and look at a 3-hour snapshot history to see what happened. *Some features, including mobile notifications, remote control, video streaming and video recording, require working internet and Wi-Fi.