Who’d have thought that radar would become an increasingly important technology in the smart home? The second-gen Google Nest Hub taps the tech to track your sleep, and now the Ring Video Doorbell Pro 2 is using it for 3D motion detection. Ring’s top-of-the-line doorbell camera offers other advanced features, too, but is it enough to justify its $250 price tag—and the subscription you’ll need to access them?
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