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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 autodialed calls, texts and prerecorded, artificial, or AI voice messages (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.

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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

Christopher Ramirez

Aug 28, 2026

Your service technician was really…

Your service technician was really awesome very friendly very polite and did very very professional work I thank you for what you've done in my home and for allowing me to feel safe but the best thing is my electricity bill is going down thank you.

Edward Fuller

Aug 28, 2026

It's great no problems enjoying the…

It's great no problems enjoying the experience so far.

Carolyn Smith

Aug 28, 2026

1st Vivint experience

The representative, Andre, provided exceptional customer service. He answered my many questions.

Thompson79

Aug 28, 2026

Wonderful service from Vivint staff and great product.

We just recently had our Vivint system installed. Joey came to the door one day. Usually I send door-to-door salemen away, but I knew we needed a security system, so we wanted to hear what he said. He is a wonderful young man. He was polite, sincere, and very knowledgeable about his product. Then Hunter installed it. He was great also. He was very thoughtful of us while he was in our house, and he, too, was very knowledgeable. He got right to it and got it done. We are very pleased.

Sharon Best

Aug 28, 2026

This person that installed the equipment …

This person that installed the equipment was very nice and he explained exactly what he was doing and answered all questions very well.I haven't had my system but thus far I'm very pleased and will definitely tell my friends how good yall are.

Vera Thomas

Aug 28, 2026

It works

Great because so far it works! I ain't had it very long . I think I get too many emails

CALVIN THOMAS

Aug 28, 2026

Very professional

Very professional

HOPE HARRISON

Aug 28, 2026

The salesman and the installation tech…

The salesman and the installation tech were very nice. Great experience!

Melinda Eichorst

Aug 28, 2026

Our installer was awesome!

Our installer, Jesse, was very knowledgeable and professional. I have previously had Vivint and know I like their service and equipment and am once again happy to be a Vivint customer.

LOGAN GARNER

Aug 28, 2026

Robert was awesome

Robert was awesome ! He was on time very polite easy to talk to you which makes it a lot better to deal with he was very informative he was quick cleaned up very throughly and I plan on adding more cameras soon and would prefer Robert to be the one to do it and if I recommend you guys to friends I would tell them he is the guy you want

Cassandra Freeman

Aug 28, 2026

Cameras are very clear and love that it…

Cameras are very clear and love that it will record even without wifi.

Vontrice

Aug 28, 2026

Great service

My technician Joe was so very helpful and answered all my questions and addressed all my concerns

Bliss Van Amsterdam

Aug 27, 2026

Great experience

Great experience

JayVanous Shelly

Aug 27, 2026

The guys that came out were very…

The guys that came out were very knowledgeable friendly and experienced very professional

Melissa

Aug 27, 2026

We really liked the sales…

We really liked the sales representative and the installer. They both were professional and yet personable. Our sales representative, Phil, really went the extra mile to make sure we understood how everything worked and what our options were. Josh did the installation the same day and did a great job! The next day Phil returned to see if we had any further questions. He was just amazing and so helpful! I have had to contact the online platform as well since then, and so far, no issues; Very efficient and helpful!

L Wi

Aug 27, 2026

Sales asscociate provider Wes was very…

Sales asscociate provider Wes was very informative about the deals currently being offered. He detailed a full product description & to which I noticed the video quality was superior to my current service. Very helpful & informative I recommend him to anyone looking to update their existing service. 👍🏽

Reginald

Aug 27, 2026

My experience with Vivant has been a…

My experience with Vivant has been a positive experience thus far, I’m excited about the chance to add some more features to fortify my home security .

Penelope

Aug 27, 2026

Positive response when needed

Positive response when needed

Nining

Aug 27, 2026

Technician very knowledgeable and very…

Technician very knowledgeable and very through on explaining everything.

Michelle Tompkins

Aug 27, 2026

Amazing and quick service

Amazing and quick service

Dalia

Aug 27, 2026

Thanks for the help

Great personality

Jane Thomad

Aug 27, 2026

A very experienced salesman!

A very experienced salesman!

Stacey Clements

Aug 27, 2026

Everything is good I am enjoying the…

Everything is good I am enjoying the system. Thanks you 🙏🏿❤️

Mary Garza

Aug 27, 2026

Every one was friendly and the…

Every one was friendly and the instructions were good but over awelmeing.

Penny Phelps

Aug 27, 2026

Friendly and knowledgeable

Friendly, professional and knowledgeable

Stephanie Hatfield

Aug 27, 2026

Daniel is fantastic

Daniel was fantastic and efficient very knowledgeable about the products and how best to use them.

Gregory Duncan

Aug 27, 2026

The sales rep that I stared off with…

The sales rep that I stared off with was name Aly, when I tried to reach out to him I was told that he was no longer the rep in this area, I would like to know who do I reach out to et service questions answred. I wanted a sign to put in the front yard .

PAUL morris

Aug 27, 2026

Very good problem solving and walking…

Very good problem solving and walking through the steps to correct things. Very professional

Shannon Gatling

Aug 27, 2026

I love the cameras and the quality and…

I love the cameras and the quality and how it makes me feel safe when I’m at home and when I’m away

Kenneth Lee

Aug 27, 2026

Service and Equipment Technology

Service and Equipment Technology. It allows me to monitor multiple homes seamlessly.

Rodney Maris

Aug 27, 2026

Technician was pleasant and fast.

Technician was pleasant and fast.

Racy LASLEY

Aug 27, 2026

I can’t say enough good things to my…

I can’t say enough good things to my neighbors & co worker’s, about the introduction, The installation and the product has been amazing!!! I’ve never felt so secure!! The cameras to the microphones work great!!! The installer was outstanding to work with!!! You have a great team & product!!! Thanks for making the home feel more protected than ever before! Well Done!

Kentrella McKinney

Aug 27, 2026

Setting up for someone to come out was…

Setting up for someone to come out was great. Fast and easy and everything was explained very well. Getting the cameras actually set up was super easy and fast.

MARIA NAVARRO

Aug 27, 2026

Fast service

Fast service, good attention to detail, excellent customer service.

Richelle Garcia

Aug 27, 2026

Excellent experience and looking…

Excellent experience and looking forward to seeing us grow together

Ronald Collins

Aug 27, 2026

The experience went well!

The experience went well!

Michael Pullia

Aug 27, 2026

My door lock is still not connected.

My door lock is still not connected.

Stephanie Nourse

Aug 27, 2026

The installation process had some…

The installation process had some issues along the way. However Marc was amazing at troubleshooting and communicating what we needed and how he would resolve the issues

Sattoria West

Aug 27, 2026

The technician was very polite and…

The technician was very polite and helpful and professional I love the security system so far

Jerry

Aug 27, 2026

Love the system and the service…

Love the system and the service installer was great

TONY M MONTES

Aug 27, 2026

The Vivint doorbell and thermostat…

The Vivint doorbell and thermostat system is really nice. It’s my first time owning a system like this and it makes things convenient for me to use.

Reginald Montgomery

Aug 27, 2026

It needs to come with two cameras for the price they're asking

It wasn't anything special just like any I'm a company they change a wire and explain it to you and then they leave but the most important part to me was the security cameras only come with one camera when I need two!!!!!! I asked for another camera and they told me $400 up front which was some BS to me

Melissa

Aug 27, 2026

I received a full explanation of the…

I received a full explanation of the system and costs before I got it. I was hesitant at first, but I can not be happier now that I have it. I feel much more secure having it in my home!

Takisha Curry

Aug 27, 2026

I love the professionalism and the…

I love the professionalism and the product is awesome

Nancy

Aug 27, 2026

Our representative was very personable…

Our representative was very personable and knowledgeable and helpful. Still getting used to having someone tell me my door is open or closed.

Billy Stanley jr

Aug 27, 2026

The tech made my experience great.super…

The tech made my experience great.super nice and well knowledge in products Billy stanley

Trevor Payton

Aug 27, 2026

Swift adaptation to todays technical…

Swift adaptation to todays technical understanding

Sandra McQuillan

Aug 27, 2026

I love my cameras I feel protected

I love my camera I feel protected. I’m having no problem with them. very happy with my camera

Rated 4 out of 5 based on
66,395 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.