The Nest Guard hub pictured is the brains of the $499 Nest Secure alarm system.
The system is currently only available in the United States. At the current exchange rate, $499 converts to roughly £380 and AU$650.
The Guard has an 85-decibel siren, a keypad for arming and disarming and an LED ring that alerts you to the system's status.
Enter your 6-digit PIN code to arm and disarm your Nest Secure.
You can also arm and disarm with a Nest Tag key fob.
Just tap a Tag gently on the top of the Guard to arm or disarm.
The system also comes with two Detect sensors. Use them as open/close sensors on doors or windows, or simply as motion sensors when attached to a wall.
You can adjust settings and check on your system remotely from the Nest app for Android and iPhone.