The Yale Smart Home Basic SR-2100i alarm system consists of a smart hub with an integrated siren, a motion sensor, a magnetic contact, and a control panel. Control the alarm system via the app on your smart device (iOS and Android). Connect the smart hub to your router via the Ethernet cable and get started immediately. When 1 of the connected accessories detects any trouble, a 94dB audio signal will sound and every linked user receives a push notification via the app. You're always in the know, even if you're not at home yourself. You can turn on the alarm to its full extent or choose to turn it on for the ground floor alone. This option comes in handy for when you're sleeping on the top floor.