Type

1. Classic 

The simplest and most proven solution that does not require batteries, cables, or maintenance.

• Advantages: Very affordable, durable over time, installed in just a few minutes.

• What to look for: Choose a peephole with a viewing angle of at least 180° to 200° so you don’t have blind spots. Prefer a glass lens over plastic, as it lasts longer, is easy to clean, and does not scratch.

2. Simple Digital (with LCD Screen)

Replaces the traditional peephole and displays the view from outside on a color screen on the inside of the door.

• Advantages: Ideal if you have small children (who cannot reach the height of a classic peephole) or elderly people with limited vision. Press a button and clearly see who is outside.

• What to look for: Check the screen size (usually 2.8" to 4.3") and the resolution quality.

3. Smart Digital (Smart / Wi-Fi)

The ultimate choice if you want full control of your entrance even when you are away from home.

• Advantages:

  • Connects to Wi-Fi and sends notifications to your smartphone.

  • Features motion detection (PIR sensor) to alert you if someone is standing outside your door, even if they do not ring the bell.

  • Offers two-way audio (you can speak to the visitor or delivery person from your phone).

  • Records photos or videos to a micro-SD card or to the Cloud.

• What to look for: Requires a strong Wi-Fi signal at the front door and a rechargeable lithium battery with long autonomy.

4 Tips before you buy

1. Door Thickness and Hole Diameter

Before you order, measure accurately:

• Your door thickness: Most peepholes cover thicknesses from 35mm to 110mm, but on armored doors the thickness is often greater.

• The diameter of the existing hole: Standard diameters are 14mm to 22mm. If you are replacing an old peephole, the new one must fit exactly into the same hole without needing to drill again.

2. Viewing Angle

The larger the angle, the fewer blind spots you have in your hallway or yard.

• For optical peepholes, aim for 180°–200°.

• For digital peepholes, a wide-angle camera of 120°–160° is considered more than sufficient.

3. Night Vision (IR)

If the hallway of your apartment building does not have good lighting or if it is an exterior door of a house, choose a digital peephole with infrared LEDs (IR LEDs). This ensures a clear image even in complete darkness.

4. Cover

If you choose a simple optical peephole, make sure it has an interior cover. This prevents someone outside from seeing whether there is light or movement inside the house using special lenses.

Installation

• DIY Installation: Replacing an optical peephole with a digital one is a process that takes less than 10 minutes. You unscrew the old one, pass the external camera/lens through, secure the base from the inside, and snap the screen into place.

• Weather Protection: If your front door is located outdoors and exposed to rain and humidity, make sure the external part of the digital peephole has a waterproof rating (e.g., IP65).