Certified Refurbished Ring Video Doorbell Pro, with HD Video, Motion Activated Alerts, Easy Installation (existing doorbell wiring required). Includes privacy features, such as customizable privacy zones and audio privacy, to focus only on what's relevant to you. Get notifications whenever motion is detected by customizing your motion zones.With Live View, you can check in on your home any time through the Ring app. Easily setup your Ring Video Doorbell Pro by connecting to wifi via the Ring app and mounting in your desired location. Connects to existing doorbell wiring for constant power. Requires a transformer (not included): 16-24VAC, 40VA max, 50/60Hz. No halogen or garden lighting transformers; no DC transformer/power supply. Connect your Ring doorbell with Alexa to hear announcements on your compatible Echo device when your doorbell is pressed and see a live view of your camera if you have an Echo device with a screen. Talk to visitors by saying Alexa, talk to the front door.