Key Features . Ultra slim design with four interchangeable face plates160 degree field of viewRecords in crystal clear 1080p Full HD ResolutionVideo on demand with Live ViewWeather-resistant design operating between -21° and +48° CInfrared Night VisionMotion zones are customisable to focus on specific areasBank-grade encryption of your data ensures privacy With the Ring Video Doorbell Pro you can answer the door from anywhere. Get an instant alert to your smart device when anyone presses the doorbell or triggers the built-in motion sensor. With two-way voice interaction you can see hear and speak to your visitor by using the Ring app on your smart device while noise cancellation technology improves the quality of the audio signal. The Video Doorbell Pro emits an audible alert outside the home. It can be wired to trigger your existing doorbell (professional installation recommended) or linked over Wi-Fi to the Ring Chime or Ring Chime Pro (both sold separately) to sound an alert within the home.The Ring Video Doorbell Pro is Ring\'s most advanced doorbell. This version includes a Plug-in Adapter so that it can be powered by simply plugging into the mains for easy installation. System Requirements . Wireless Internet Connection (Wi-Fi)An iOS (version 8.1 or newer) Android (version 4.1 or newer) or Windows 10 device with the Ring app installed . What\'s in the Box . Ring Video Doorbell Pro4 face platesRetrofit kitUser ManualInstallation tools and screwPlug-In Adapter (2nd Generation). .