How Do Doorbell Cameras Work?

Quick answer: A doorbell camera uses motion or person detection to trigger a recording when someone approaches your door. The doorbell camera sends an instant alert to your smartphone, letting you view a live video feed and communicate with visitors through two-way audio—from anywhere.

Key takeaways:

• Doorbell cameras use motion detection to trigger a recording when someone approaches your door
• You get an instant notification and can then view video footage and communicate with whomever is at your porch
• The Vivint Doorbell Camera Pro uses intelligent detection to differentiate between people, packages, and passing cars—making sure you only get notifications that matter.

A doorbell camera (also called a video doorbell) is a smart home device that combines a traditional doorbell with a built-in camera, motion sensor, speaker, and Wi-Fi connectivity to let you see, hear, and speak to visitors remotely.

Along with giving homeowners a stronger sense of safety, doorbell security cameras have also become a convenience. Many even allow you to answer or even open your door from anywhere, as well as see and speak with a visitor remotely. So, more and more people expect to have them as part of their smart home system.

If you’re tired of looking through your door’s peephole to see who’s there, you might want to consider purchasing a smart doorbell camera. This guide explains how a smart video doorbell works and answers all your doorbell cam questions.

What are doorbell cameras, and how do they work?

A doorbell camera is a doorbell that’s been enhanced with a motion detector, a built-in video camera, and a speaker. When activated, the smart doorbell records activities outside your door and parts of your front yard and the surrounding area.

Core components of a doorbell camera

• Detection sensor: Detects approaching visitors and triggers recording
• Built-in video camera: Captures footage in HD resolution (1080p or higher)
• Two-way audio speaker and microphone: Enables real-time conversation with visitors
• Wi-Fi connectivity: Connects to your home network and smartphone app
• Cloud storage: Saves recorded footage for later review
• Smart home integration: Works with apps like the Vivint app

Doorbell cameras are Wi-Fi-enabled devices that can connect with your smartphone through an app like the Vivint app, allowing you to:

• Receive alerts when someone is at your door
• Talk to people standing just outside your home
• Watch what’s happening in real time
• Watch recordings of previous activity on your front porch or entryway

How a doorbell camera works: Step-by-step

1. The sensor detects approach
2. The camera begins recording automatically
3. An alert is sent to smartphone instantly
4. You can view the live feed—just open your app to see who's there
5. Two-way audio lets you speak with the visitor remotely
6. The footage stored for later review

The doorbell camera connects to your house’s existing doorbell system and your home’s Wi-Fi connection. When someone pushes the doorbell, a chime goes off, just like with a regular doorbell.

But even before they reach the doorway to ring the bell, the person is recorded. The motion detector connected to the video doorbell is triggered by their approach.

You’re then alerted to their presence, and you can open the doorbell camera app on your phone or smart hub (like the Vivint Smart Hub) and see a live video feed of the person standing outside your door.

Even if you miss the alert, you can rest assured that the doorbell camera has recorded their presence on your property, allowing you to review it later.

Why should I add a doorbell camera to my home?

Not only do the best video doorbells protect your privacy, your possessions, your home, and your family, but they can also provide a load of convenience.

You can choose whether you want to answer the door

There are plenty of times you might not want to answer the door. Maybe you’re still in your pajamas and don’t really feel like getting dressed to welcome uninvited guests.

You might be looking to avoid a salesperson, a political canvasser, or a visit from your ex. Maybe your next-door neighbor’s kid is a girl scout trying to peddle cookies, and you already have a freezer full of Thin Mints.

Whatever the reason you don’t feel like answering the doorbell, a doorbell camera lets you see a live video of who’s at your door — so you can make an informed decision about whether to answer the door.

Speak with visitors from anywhere with two-way talk

With two-way audio capabilities, you can speak to someone at your door even if you’re not home. Say you’re running late to meet a houseguest, or you want to tell that neighborhood kid with the Girl Scout cookies to return later—a doorbell camera lets you speak to visitors in real-time from anywhere.

Find out when packages arrive so you can keep them safe

You can set your app so that you receive motion alerts if there’s any activity in front of your house. That way, you’ll know if a package has arrived, and you can take steps to secure it.

Vivint Doorbell Camera Pro even has a Smart Deter feature to catch porch pirates — people who lay in wait to steal packages delivered to unoccupied homes — and scare them away. The Doorbell Camera Pro intuitively detects when someone is trying to take a package. It then activates a bright LED ring around the doorbell and a 90 dB speaker, letting the potential thief know they’ve been caught on camera.

Track your family coming and going

Doorbell cameras offer parents peace of mind by letting them know when their kids enter or leave the house. The motion alerts you to anyone coming or going and also allows parents to know who else is entering the house.

And if you don’t want the kids answering the door without your permission, you can look at who’s at the door and then let your kids know whether it’s safe to open up.

View movement at night

Most doorbell cameras like the Vivint Doorbell Camera Pro have night vision, which means that any suspicious movements outside your front door can be detected and recorded, even if it’s pitch black out.

Deter intruders

Most home burglaries happen from mid-morning to mid-afternoon when houses are most likely to be empty. Often, intruders will ring a house’s doorbell before they try to make illegal entry to verify that nobody is home.

With a doorbell camera, you’ll be notified that someone is ringing the doorbell, will be able to see who it is, and can answer them through the microphone and act like you’re home, scaring the would-be burglars away.

Vivint Doorbell Camera Pro

Vivint, a recognized leader in home security, offers advanced and user-friendly doorbell cameras. The Vivint Doorbell Camera Pro takes video doorbell technology to the next level with these enhanced features:

Vivint Doorbell Camera Pro specifications

Key features include:

• Vivint Smart Deter: A bright LED ring and 90 dB speaker that activate the second someone tries to remove an item from outside your door
• A wired and constantly connected camera with a 180° x 180° field of view—the tallest and widest of any doorbell camera—that also features powerful infrared night vision and crystal-clear 1080p HDR resolution
• Customizable surveillance zones that allow the Doorbell Camera Pro to protect your entire porch or just a specific part of it, eliminating unnecessary notifications
• More accurate person and vehicle detection, so you only get alerted for what matters.
• An easy-to-use notification system that can be set to your specifications so that you only receive notifications that matter

Plus, with professional installation as a part of every Vivint system, you can have confidence that your doorbell camera is working correctly from day one.

Discover the ultimate home security solutions from Vivint

A doorbell camera from Vivint can offer your family a new level of convenience, heightened security, and some precious peace of mind.

If you’re interested in learning more about doorbell cameras and seeing what other Vivint smart home technologies can make your life even easier, contact one of our Vivint pros at 855.822.1220 today.

Frequently asked doorbell camera questions

Learn more about doorbell cameras and how they work.

Do doorbell cameras record all the time?

Short answer: No, most doorbell cameras do not record continuously. Instead, they start recording when there is an event to record.

Doorbell cameras—like the Vivint Doorbell Camera Pro— begin recording as soon as the cameras detect a visitor. If you prefer to customize your cameras, you can set them to record when doors are opened, when someone locks or unlocks doors with the keypad, when motion inside is detected, or if the alarm is triggered.

Videos captured by the system may stay in cloud storage for up to 10 hours with standard plans, though some providers offer extended storage.

How long do doorbell cameras record?

Short answer: Doorbell cameras record as long as there is motion to record.

Since they use motion sensors, most doorbell cameras’ video recording functions continue as long as the device detects motion. Once the motion stops, the video doorbell camera will stop recording.

How are doorbell cameras powered?

Short answer: Doorbell cameras can be hardwired, battery-powered, or solar-powered.

Video doorbells have one of three types of power sources:

• Hardwired. This type of camera gets power through the home's existing doorbell wiring. Wired doorbells, like Vivint's Doorbell Camera Pro, are preferred by people who want the peace of mind that comes with knowing that the doorbell camera is going to be working when you need it.
• Battery-powered. These doorbell cameras are wireless and powered through a rechargeable battery pack. This type of system is often chosen by renters who may not want to seek their landlord's permission to install a hardwired device.
• Solar-powered. A solar-powered doorbell comes with solar panels that automatically recharge the batteries.

If you’re not sure which works best for you, a video doorbell pro can make a recommendation.

Do doorbell cameras need Wi-Fi?

Short answer: Yes, most doorbell cameras require Wi-Fi to function fully.

Most doorbell cameras need Wi-Fi to function fully. For example, with the Vivint Doorbell Camera Pro, you’ll need Wi-Fi to use the device’s two-way talk feature, record and save video, and get notifications on your phone after person detection.