The easy-to-use Nest Secure alarm system consists of several components. Nest Guard serves as the base unit and has a keypad, a built-in motion sensor and an alarm function. The Nest Detect multi-sensor notices movement in the home. This device is very small and can be mounted discreetly on the door, wall or window. The Nest app can arm and disarm the system and will notify users if something looks amiss at home. This alarm system is easy to activate or deactivate – by phone, with a password or by using Nest Tag.