Brand New Seal in retail Package. Requires Existing Doorbell Wires, 16-24 VAC, 30 VA or above. HD Video for Clear Viewing: 1080p-grade resolution, combined with our advanced HDR and Distortion Correction, ensures video is recorded in crisp clarity. Respond in Real-Time: Speak directly to anyone who approaches your front door via two-way audio.Tell your friends to come round the back or that you have just run out to get some milk. The Alerts Which Matter: With AI technology and our sophisticated algorithm, the camera intelligently detects body shape and face pattern. Ensuring you are only alerted when a human, and not a stray cat, is at the door. Free electronic chime included: Supports 8 common and holiday themed ringtones and adjustable volume level.