How Do Doorbell Cameras Work
Doorbell cameras (also called video doorbells) come with a built-in camera that records footage you can watch on your phone, tablet, or computer.
Over the past several years, video doorbells have become a common fixture in homes. They let you see and talk to whoever’s at your door, whether you’re inside, at work, or on vacation.
Many doorbell cameras have a microphone and speaker built right in, so you can have a quick conversation with the person at your door. This is especially handy for deliveries. If you’re not home, you can tell the courier to leave the package or let them know when you’ll be back.
A video doorbell also adds a layer of security since you can check who’s outside before deciding to open the door. But how does all this tech actually work?
How Do Doorbell Cameras Work
A doorbell camera works a lot like a smart security camera. It connects to your home Wi-Fi network and, in some cases, hooks into your existing doorbell wiring. When someone presses the button, it chimes just like a regular doorbell.
The real difference is motion detection. When the camera picks up movement at your front door, back door, or even a few feet away, it automatically starts recording.
We break down how to connect Ring doorbell to Alexa in a separate post that complements this one.
You’ll get a notification on your phone, tablet, or computer letting you know someone’s there. You’ll need the doorbell’s companion app installed for this to work.
Tap the notification and you can pull up a live video feed from the camera in real time.
Since these cameras record on motion triggers or continuously, storage matters. Most doorbell cameras either save footage to the cloud (usually with a subscription plan) or to a microSD card.
Depending on the brand and model, doorbell cameras record in HD (720p), Full HD (1080p), or 4K Ultra HD (2160p). They also have night vision, so you’ll get clear footage even after dark.
For a different take, see our guide on wireless doorbell cameras.
Because video doorbells are smart devices, they work with voice assistants like Amazon Alexa, Apple Siri, and Google Assistant. That means you can integrate them into your smart home setup and view the live feed on a smart display or control them with a smart speaker.
What is Two-Way Audio On Doorbell Cameras
Two-way audio means the doorbell camera has both a microphone and a speaker. You can talk back and forth with whoever’s at your door, even if you’re miles away.
You do this through the camera’s companion app. Tell the delivery driver to leave the package by the garage, or call the kids in from the yard. It also lets you talk to a stranger at your door before you decide to open it, which is a nice safety feature.
How Far Can a Video Doorbell Camera See
Most doorbell cameras can see between five and fifty feet. A longer range is generally better, but keep in mind that some cities and HOAs have rules about recording public sidewalks and roads.
What’s their field of view for a video doorbell camera
Field of view measures how wide an area the camera lens can capture. Most video doorbells offer between 150 and 180 degrees, though some go up to 200 degrees.
A wider field of view means the camera covers more area. A doorbell with 180-degree coverage, for example, can see across your entire front lawn.
What Powers Doorbell Cameras
Video doorbells run on one of three power sources: hardwired electricity (using your existing doorbell wiring), rechargeable batteries, or solar panels.
Solar-powered models are great if you don’t want to deal with recharging batteries or running new wiring. Battery models work well for homes that don’t have existing doorbell wiring. And hardwired doorbells are the best option if you want a set-it-and-forget-it setup.
So that’s the basics of how a doorbell camera works. With so many options on the market, it can feel overwhelming to pick the right one. Focus on the specs that matter most: field of view, video resolution, and night vision quality.
