Built in camera with 1.3MP resolution and 6x digital zoom gives you a clear view of the area around the door 802.11a/b/g/n/ac (2.4 GHz and 5 GHz) Wi-Fi and Bluetooth Low Energy connectivity allow you to check missed events and history anytime, anywhere Compatible with chimes rated to work with a 16 - 24VAC and 10VA doorbell transformer Google home app lets you monitor and change settings for easy and convenient usage Night vision provides crystal clear picture quality even during low-light conditions to identify who is at the door Built-in intelligence and motion sensors identify and notify you about a person, package, vehicle, or animal for easy detection Two-way communication ensures loud-and-clear conversation with the visitor Amazon Alexa and Google Assistant compatibility let you monitor and control the device with simple voice commands