Full HD Video Camera with 120° Wide Horizontal View Angle: 1080p Full HD Video quality with a high resolution 2 MP Camera. The Fresnel lens gives a 120° Wide Horizontal View Angle to give a broad view of the surroundings. You can see the visitor no matter where they are standing. Battery-less Hasslefree Operation: Wipro Smart Doorbell works with AC adapter, and doesn't require batteries. No hassles of charging the batteries now. Two-way Communication: The Door bell comes with a built-in advanced microphone feature that enables 2-way audio communication seamlessly. Now you can talk and listen to the visitor from your mobile itself wherever you are. Smart AI Motion Detection: The PIR sensor accurately detects any motion triggered by humans and sends a smart alert effectively on your mobile, eliminating false alerts Night Vision: You can see the person even during night with IR lens, which switches automatically depending on natural light.