Nest Secure is a home security system designed to be tough on intruders and easy on you: an all-in-one security base that integrates alarm, keypad and motion sensor, along with a friendly voice. Nest Secure detects both motion and open-or-close movement in one compact battery-powered product. Put it on a window and it will know when it opens. Stick it on a wall and it senses motion in a room. Place it on a door and it can do both. Nest Tag is a convenient fob that can attach to a keychain, allowing you to easily arm and disarm Nest Secure.