You need a door viewer primarily for security and safety reasons. It allows you to see who is outside your door without opening it, preventing potential intruders from gaining access by surprise or trickery. This is especially important because some burglars or unwanted visitors may try to force their way in once the door is opened.
Traditional door viewers, or peepholes, use a small fisheye lens installed in the door to provide a wide-angle view of the outside, typically around 160 to 200 degrees, so you can identify visitors clearly before deciding to open the door. They are simple, inexpensive, and effective for basic security.
Modern digital door viewers enhance this function by including cameras, motion sensors, and screens or smartphone apps, allowing you to:
- View the outside remotely, even when you are not home
- Receive motion alerts and record suspicious activity
- Use night vision for low-light conditions
- Communicate via two-way audio with visitors or delivery people
- Integrate with smart home systems for added convenience and security
Digital viewers are especially useful for people with limited mobility or vision, seniors, those living alone, or anyone seeking advanced home security.
In summary, a door viewer is essential to:
- Identify visitors safely without opening the door
- Prevent unauthorized entry and enhance burglary protection
- Increase convenience and accessibility with modern digital features
- Provide peace of mind by monitoring your doorstep remotely
This makes door viewers a valuable security device for homes, apartments, hotels, and other secure facilities.
