FeaturesWorks with Alexa for voice control (Alexa device sold separately).100 percent Wire free Free of power cords and wiring hassles1080p HD High quality video with sharper and brighter details.Wireless rangeDoorbell notifications Get calls on your smartphone or tablet when someone presses your Arlo DoorbellRemote communication Talk with visitors from your smartphone or tabletVisitor messaging Visitors can leave a message for you to listen remotely at your convenience