1. Remote Video Call: After connecting the doorbell to the monitor, the indoor monitor allows you to view the outdoor camera's video. This is especially useful when elderly or children don't have a smartphone, as they can easily check the monitor to see who is at the door. 2. High Fidelity Microphone: With a two way voice design, paired with a high power speaker and highly sensitive microphone, the visual conversation at the door is clear and smooth. The volume can be adjusted to avoid disturbing other family members. 3. Wide Angle Lens: The wide angle lens captures a wide view of the door, leaving no "blind spots" for security purposes. Even with multiple visitors, you can clearly see each one. 4. HD Camera: The high definition camera can capture 1080P level HD videos, recording every detail clearly. This allows you to see the details of the visitors with precision. 5. Day and Night Camera: Equipped with high power infrared night vision lights and an ICR infrared filter, the camera automatically switches between day and night modes. Even in pitch black environments, you can still see and capture clear images. Built in Power Supply: Both the doorbell and monitor are equipped with large batteries. Even in the event of a sudden power outage, the low power doorbell and monitor can continue to work for a period of time. Item Type: Visual Intercom Doorbell Lens Angle: 70° Number of Infrared Lights: 4 Night Vision Distance: 5-10 meters Pickup Distance: 5 meters Storage Mode: small memory card (not included) (supports up to 256GB) Doorbell Camera Battery Type: Lithium ion battery Doorbell Camera Battery Capacity: 800mAh (with built in battery) Display Battery Capacity: 400mAh (with built in battery) Charging Interface Type: Type C WiFi Version: 2.4GHz Colour:As Shown Material:ABS Package Contents: 1 x wireless doo