The Ring Video Doorbell (2nd Gen) with Alexa in Satin Nickel (8VRDP7-0EU0) is a modern, rectangular-shaped video doorbell made of plastic. It features a 155-degree view, wireless connectivity, and smart home compatibility with Amazon Alexa. This sleek silver or black device by Ring is perfect for homes and offers a polished nickel finish with a round button shape for easy operation. With its battery power source, this video doorbell provides an innovative and convenient way to enhance your home security system. As shown - 4 screws for mounting base plate.