Complete front door security system includes a hub, smart doorbell, and a smart lock Control the smart lock remotely, via the keypad, or using a backup key Smart doorbell allows for two-way communication, remote monitoring, mobile alerts, and more Doorbell camera offers a 4MP super HD max camera resolution, with night vision for better low-light visibility Wi-Fi bridge required - includes the Ezlo Plus hub Doorbell and hub require plug-in power; lock runs on batteries - four AA batteries included Compatible with the Alfred Home App, Alexa, Hey Google, and the Vera/Ezlo app