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smart fire sensors

Detect danger before
you even smell smoke

Undetected fires can do serious damage in just a few minutes. The battery-operated Smoke & CO Combo Detector, equipped with photoelectric sensors, keeps you in the clear. If smoke or excessive heat is detected, an alarm will sound, potentially alerting you before you even smell smoke.

best smoke and co detector

You can’t identify carbon monoxide, but our detector can

Keep your home and the people and pets you love safe
from carbon monoxide. While you can’t see, smell, or
taste this toxic gas, the intuitive Smoke & CO Combo
Detector uses electrochemical sensors that identify the
presence of CO right away, giving you time to take action.

best smoke and co detector + system integration

Smarter home, smarter response to alarms

When your Smoke & CO Combo Detector alarm
sounds, your system takes action automatically: 

  • In the event of fire, your HVAC system shuts off to
    slow the spread of flames for elevated fire safety.

  • Doors unlock so family can quickly exit and first
    responders can enter.

Smoke & CO Detector Specs

COLOR
White
SIZE
4.96″ø x 2.64″ Tall
FREQUENCY
345 MHz
SIREN LEVEL
85 dB
MOUNTING
Screws and bracket
BATTERY
2 CR123A batteries
BATTERY LIFE
5 years
PRODUCT PROTECTION PLAN
The Vivint Protection Plan* (VPP) offers ongoing support and coverage when you invest in a Vivint system.
SKU
VS-SMKCO2-345
GTIN
198715291841

Design your Vivint
system today

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and call us now
844.481.8630

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1. The Electronic Disclosure Consent;
2. Receive recurring marketing communications from Vivint at the telephone number and email address you provide on this form, including calls, texts, emails, and voice messages delivered using automated dialing systems, prerecorded or artificial voice, and AI-enabled technologies (consent not required to make a purchase; reply “STOP” to opt-out of texts or “HELP” for help); and
3. Vivint's Terms of Service and Privacy Policy.

smart smoke detector and carbon monoxide alarm

Why choose the Vivint Smoke & CO Combo Detector?

Reliable detection

This fast and accurate CO and smoke detector identifies threats early, giving you time to act and keep home and family safe.

Better fire protection

Your home and family are safer with a detector that uses photoelectric sensors to identify excessive heat before you even smell smoke.

Instant alerts

A built-in wireless transmitter communicates directly with your Smart Hub and Vivint app, alerting first responders if necessary.

More safety

This detector works with your Vivint smart home to shut down your HVAC system in the event of fire to mitigate the spread of flames.

Battery powered

The battery-operated combination CO and smoke detector comes with a 5-year battery plus backup, so it’s always on.

24/7 Monitoring

If your detector is triggered, our support team is notified instantly. They’ll contact first responders if you can’t be reached.

SWIPE TO SEE MORE

Home security companies

See how Vivint compares to the competition.

Feature
24/7 security monitoring with 2-way talk through panel Yes No No No Yes
Cameras use vision based AI and automated light/sound to deter crime Yes No No No Yes
Doorbell detects and protects packages Yes No No No No
Professional installation from experts on staff Yes Yes No No Yes
Products designed/developed in-house Yes No Yes Yes No
60 month interest-free financing Yes Yes No No No

(As of June 2026)

Frequently asked smoke and carbon
monoxide detector questions

Are combination smoke and carbon monoxide detectors good?

Absolutely. With a combination smoke and carbon monoxide detector you get double protection with a device that identifies life-threatening fire and CO. Technologies that work together to identify smoke and CO makes sense, given that carbon monoxide often builds up as a result of fire.

With a combination detector from Vivint you get the added protection that comes with 24/7 Monitoring. Our specialists are ready to respond to an alarm day or night whether you’re away or asleep in bed to ensure the safety of your home and family. See it and our other products in action.

Is it better to have separate smoke and carbon monoxide detectors?

Installing combination smoke and CO detectors is a simple way to streamline the interior of your home without sacrificing safety. Our combo detector is not hardwired, making installation easier. And fewer battery changes are necessary, and one unit requires less space than two separate units—convenient especially for smaller living spaces. Distinct alarms indicate whether smoke or CO is detected to avoid confusion.

Where do you put a combination smoke CO detector?

Placement of your combination smoke and CO detectors is much the same as mounting individual detectors. And because the smoke CO detector is not hardwired, installation is easy. According to the National Fire Protection Association, you should install carbon monoxide and smoke alarms in the following spots:

  • On each level of a multilevel home

  • Near bedrooms and sleeping areas

  • Any other areas required by law

To make sure you’re protected again carbon monoxide, combination detectors should also be mounted in the following locations:

  • Near sources of CO.Place CO detectors 5-20 feet from common sources of carbon monoxide in the home, such as your water heater, furnace, or space heaters. Make sure you don’t place detectors too close to the sources, which could result in false alarms.

  • Near your attached garage. Running vehicles produce carbon monoxide through their exhaust systems. When a car is in motion or idling in an open space, carbon monoxide and other emissions dissipate and are released into the air as pollution. In enclosed spaces like a garage, however, the concentration of CO can quickly reach deadly levels and can seep into your home.

Try to place detectors approximately 6 inches above or below the ceiling. If ceiling mounted, the detector should be positioned at least 6 inches away from the wall. Other things to keep in mind:

  • Smoke and CO detectors should always be 5 to 15 feet away from fuel burning appliances.

  • Nothing should cover or obstruct the detector.

  • Avoid placing detectors next to exterior doors and windows.

Keep in mind that these are minimum requirements. Depending on the size of your home you may need additional detectors.

ONE STOP SHOP
Vivint made, pro installed

We design and build our family of products in-house and our Smart Home Pros take care of home automation installation to ensure your devices connect and work together seamlessly.

SUPPORT AND CARE
In your corner, every step

Once your system’s up and running, we provide ongoing service support. And our monitoring team is available 24/7 to respond to alarms and help in an emergency.

Combine products for even more benefits

Vivint outdoor camera pro monitoring home perimeter

See outside

Protect your property with a camera that actively deters lurkers with light and sound and sends you notifications so you always know what's happening outside your home.

A hand presses a Vivint doorbell camera mounted on a home's front porch.

A more flexible and secure front door

Unexpected visitors? With the Vivint Doorbell Camera Pro and smart locks as part of your system, answer the door with the Doorbell Camera, let visitors in your home with Smart Locks, and lock up when they leave.

Smart Lock on door with a product image of a Smart Lock on bottom corner

Never carry keys again

Lock up with the press of a button or right form the Vivint app. With smart locks, you can set your system to arm when you lock the door, and know who's coming and going with unique access codes.

Customer reviews

Real customer reviews tell the true Vivint story

Jean

Sep 9, 2026

First the sale associate Juan was so…

First the sale associate Juan was so polite and respectful,then the technician Tray that came to install the system for me was so professional,kind,polite and beyond showing everything to work the equipment.

Kamyah Coe

Sep 9, 2026

I love it they fast and affordable

I love it they fast and affordable

June

Sep 9, 2026

Smooth talking sales representative

Smooth talking sales representative. Installer worked fast. A lot to digest in a short sales pitch. Why were certain areas targeted? Wll try to keep system not sure if i will. Very expensive.

Ira Gold

Sep 9, 2026

Everything we expected and more

Our installer, Jason, was excellent. The equipment all works as advertised and the system is easy to use and understand.

Eleanor Faulk

Sep 9, 2026

Awesome service

Awesome service

JENNIFER PRICE

Sep 9, 2026

Vivint

System, tech

Marilyn McDonald

Sep 9, 2026

The representative was very patient…

The representative was very patient with me and my lack of understanding technical things. I really appreciated that.

ANTHONY MILLIGAN

Sep 9, 2026

Minimal complications

Minimal complications

Delois George

Sep 9, 2026

Well it’s been good so far and it been…

Well it’s been good so far and it been work for my good

PANDORA NESTLEROAD

Sep 9, 2026

Great experience

Great experience. I love the set up so far and the technician was great at his job. I definitely recommend Vivint!

Jackie

Sep 8, 2026

Daniel W

Daniel W. was very informative and knowledgeable of the installation and Vivint security system operation.

Susie Langley

Sep 8, 2026

It’s a good to have a camera that I can…

It’s a good to have a camera that I can look all around my home you feel most safer but just a little pricey, but I guess it worth it. We all need it can’t quite afford it, but we gonna try it and the young man’s was very respectable, kind and friendly.

Blake Johnson

Sep 8, 2026

I did an excellent job installing my…

I did an excellent job installing my system! I'm a darn good tech thanks Blake 257367. Lol

Doris J ingram

Sep 8, 2026

The representative was polite and took…

The representative was polite and took the time to make feel like a special person by explaining things in detail that I could really understand

Jerome Woodfork

Sep 8, 2026

The salesman Larry was very kind and…

The salesman Larry was very kind and courteous and respectful and explained everything very well to the point that I could understand pretty much how to work everything on my first time trying he is a very good salesman and very knowledgeable.

Regenia Kendrick

Sep 8, 2026

Very thorough tech who provided…

Very thorough tech who provided excellent service

DIANE JOHNSON

Sep 8, 2026

The young man was very polite and…

The young man was very polite and knowledgeable

Clifton Palmer McLendon

Sep 8, 2026

Good job!

Freedom (the salesgirl) was well-informed and had an effervescent personality! The installing technician was efficient.

Michael Wright

Sep 8, 2026

Excellent service

Excellent service

Cynthia Lowe

Sep 8, 2026

BEWARE OF PUSHY SALESMEN. The uninstall tech was great!

The good part of this review is about the UNinstall. My experience with the UNinstall was great. I was VERY glad to get UNinstalled from the system! I'm ashamed to admit that I was talked into buying this system by a smooth-talking salesman who pushed me right into a five-year contract before I knew what was happening. Don't believe the salesman when he tells you that you have 60 days in which to cancel. It's actually 3 days, and I barely got in under the wire! Praise God I'm out, the equipment is gone, the loan is canceled, and I will not fall for this again!!!! Now, on to the good part: The tech, Ray O'Neil, who came to uninstall the equipment couldn't have been nicer. He was quick, knowledgeable, polite, and very good at what he does. I appreciated him immensely. After removing the Vivint equipment, he put back my deadbolt, thermostat and doorbell. Thank you Ray!!! Don't let a salesman talk you into something you don't need and don't want!!!!!!

PATRICIA GUZMAN

Sep 8, 2026

The camara it's doesn't shoup on my…

The camara it's doesn't shoup on my phone when I out from home.

Mary Simmons

Sep 8, 2026

Alex was great

Alex was great. He explained the system very well. Make sure I understand everything before he left well mannered love his company. He is a great seller.

Alice Hedgepeth

Sep 8, 2026

He came before it was his time and I…

He came before it was his time and I really do appreciate it that

Ken Gorsuch

Sep 8, 2026

Some of the work was questioned but all…

Some of the work was questioned but all seems to work! So far no issues!

Ray CLARK

Sep 8, 2026

Installation

Our experience right now is we have had more problems with your installation than we had with our old company’s installation

Cathy Redmond

Sep 8, 2026

The company is respectful

The company is respectful, helpful, and kind and they care about how we feel about security around our homes. They answer any questions you have and make sure you understand the equipment and are happy with it all

Jeanie Clay

Sep 8, 2026

The salesmen was so informative and…

The salesmen was so informative and knowledgeable of the system.

Roy

Sep 8, 2026

Managed to get me to someone to…

Managed to get me to someone to schedule installation of equipment within 12 minutes.

CAROLYN COKLEY

Sep 8, 2026

The techs that came out were very…

The techs that came out were very courteous and explained everything to my family. We love it

Valerie Briscoe

Sep 8, 2026

Love the clarity of the cameras

Love the clarity of the cameras

Darcy Naquin

Sep 8, 2026

Professionally installed and great quality

We been very satisfied with our cameras and security system.

MD Stanfill

Sep 8, 2026

Very informative and did extremely…

Very informative and did extremely great efficient work

Iris Gary

Sep 8, 2026

They are good with what they do

They are good with what they do

Margaret Jameson

Sep 8, 2026

Your Rep that came to our home name…

Your Rep that came to our home name Eiman was a very helpful and patience man explained us everything on what to do and how it works. We are so please with him and also he's very knowlegeble on the work he do. He's a keeper to the company.

Alec

Sep 8, 2026

Not bad

Not bad by any means.

Derinda Hannes

Sep 8, 2026

I’m really enjoying my security system

I’m really enjoying my security system. I like been able knowing whose at the door before running to find that it’s kids playing. A sheriff came other day to see the camera because a kid went missing and they was able to see what time he walked off. He back home but it was very comfortable of know security.

Dennis de Tray

Sep 8, 2026

The best people

The technician was excellent.

Lutisia Smith

Sep 8, 2026

UpGrades System

This was always a good system. Now it is a great system with all the upgrades. I love it. David Kelly was great with explaining all the options.

SarrahAnn Kelly

Sep 8, 2026

The guys explained everything and was…

The guys explained everything and was so friendly and nice.I appreciated them so much.

Jimmie Crenshaw III

Sep 8, 2026

The technician was very polite and…

The technician was very polite and knowledgeable.

Daveetta Black

Sep 8, 2026

Just the overall everything has been…

Just the overall everything has been very helpful!!

Andrea Hilden

Sep 8, 2026

Surprised that the battery for the door…

Surprised that the battery for the door sensor is already low/ needing to be replaced

Brent Lopez

Sep 8, 2026

EVERYTHING WAS GREATn OUR TECHS WERE…

EVERYTHING WAS GREATn OUR TECHS WERE AWESOME!

Dawn Ruder

Sep 8, 2026

Professional Installation

The installation gentleman was polite and knowledgeable. I felt comfortable with him in my building.

Porter McKinney

Sep 8, 2026

Where were the window sensors placed

Everything was good except I don’t know where they put the window sensors,Other than that everything seems to be okay.Did the sales representative tell them I don’t know.

William Whitaker

Sep 8, 2026

The technician find a great job on the…

The technician find a great job on the install as well as the tutorial.

Robert Wright

Sep 8, 2026

Customer service

Customer service

Shanta Moreland

Sep 8, 2026

Kory & Moe

Kory was amazing and Moe came through with the installation. Moe is one of the kindest and sweetest professionals I've ever met!

Rated 4 out of 5 based on
66,803 reviews on

*Offer Terms & Conditions

All offers are subject to availability and may not be available in all states, provinces, or zip codes. Taxes and additional fees may apply.

HomeProtect Offer Terms

Vivint’s standard HomeProtect package includes 1 Vivint Security Hub, 3 Vivint Door & Window Sensors, 1 Vivint Motion Sensor, 1 Vivint Keypad, and 1 Vivint yard sign. The HomeProtect equipment package is regularly priced at $349.99, with professional installation priced at $199 and Vivint system monitoring at $29.99/mo., unless otherwise advertised. Offer for new Vivint customers only.

HomeProtect Pro Offer Terms

The HomeProtect Pro Offer is available to new and existing Vivint customers and requires a minimum $749.99 expenditure on equipment (after discounts), professional installation and execution of a Vivint services agreement. Monthly service fees vary based on the products and services you select. HomeProtect system purchases and reactivations of previously-installed systems are not eligible for this offer.

Financing Options

Financing for equipment purchases is subject to credit approval by one of Vivint’s third-party financing partners. Qualified customers may finance at 0% APR for up to 60 months, with terms varying by offer. Financing requires a separate agreement with the financing partner. Month-to-month service agreements are available when equipment is purchased upfront.

Vivint Systems & Services

System can support multiple cameras, subject to sufficient WiFi speeds. Without a Vivint services plan, product and system functionality is limited (including loss of remote connectivity). Contact a Vivint representative for complete equipment, services, and pricing details. Products and services in Louisiana provided by Vivint Louisiana Commercial Certificate #58280. See Vivint license numbers here. Click here for full terms of service.