The contact sensors also only detect for opening and closing doors and windows, whereas the Nest Detects detect for door and window openings but also include motion sensors. The basic Nest Secure package comes with a hub — the Guard — two key fobs Nest Tags that allow you to check in and out of your system, and two sets of motion detecting sensors you can attach to doors or windows Nest Detects. At 3. 7 inches in diameter and 2. 1 inches high with a matte white finish, the hub makes an unobtrusive addition to any side table, while the Detects are discreet and responsive for up to 15 ft. The Guard also comes with a Google Assistant built in, so you can use voice commands to arm the system but not disarm, play music, or even request a temperature change, if you have a Nest thermostat.

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For $10 a month, you get all the normal Nest Cam features plus a full 10 day video history, person alerts Nest not only notifies you of motion, but it can try to determine if the shape it's seeing is a person, activity zones instead of tracking motion across the entirety of its view, Nest Cam can pay attention to specific zones, and clips and time lapses if your Nest Cam captures something you've got to share, you can create downloadable video clips.

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