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G4S also works with governments overseas to deliver security.fire detection alarm
99View at Amazon$249View at WalmartSee all prices 28 found?These days, Nest is part of Google, and the company has expanded into home security with Nest Secure. This is sold as the Nest Secure alarm system, commanding a premium fee of $399, and it includes a base station, two Nest Tags, and two sensors. The Nest Tag is a key fob style device that can arm or disarm the system when in proximity with the base station – other options for arming include a passcode, Google Assistant, and the Nest App. The sensor is Stick Nest Detect, which is a versatile piece of hardware, as each one can be used to secure a window, door, or even a wall, as it detects motion, with additional sensors available for $49. All of these sensors feed their information through the base station to the Nest App. Nest Secure works over Wi Fi, but cellular access as a backup is a $5 additional monthly option.