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Low Profile Combo Photoelectric Smoke & Carbon Monoxide Alarm

The First Alert PRC700 Smoke and Carbon Monoxide Alarm has a slim profile, designed to blend more fully into the wall and out of sight. It offers the same functionality you expect from First Alert with a new design that takes up less space. The battery-operated smoke and carbon monoxide detector alerts you to possible smoke or carbon monoxide and can be installed anywhere, no wires required.

Slim Profile Is Ideal for Modern Decor

The First Alert Combination Carbon Monoxide and Photoelectric Smoke Alarm is half the thickness of traditional detection devices, while still offering trusted detection of smoke and carbon monoxide. The thin design blends more easily into walls and ceilings, ensuring safety does not interfere with style. The sleek, white disk minimizes the usual lights and buttons of regular detectors for a cleaner look.

Comprehensive Detection for Your Home or Office

A photoelectric sensor detects smoke from slow smoldering fires, while reducing the number of false of alarms due to cooking smoke or steam from a shower. The advanced electrochemical sensor detects carbon monoxide leaks from multiple sources, including faulty fuel-burning appliances. The combination smoke and CO detector provides monitoring for both conditions in one streamlined device.

Battery Operation Eliminates Wires

The Combination Carbon Monoxide and Photoelectric Smoke Alarm operates on two AA batteries, eliminating the need for wires or installation by an electrician. It can be mounted anywhere, on ceilings and walls. Battery operation means that even in the event of a power outage, the alarm can still function.

First Alert Low Profile Battery Operated Photoelectric Smoke & Carbon Monoxide Alarm PRC700

* Recommended replacement for the following obsolete models: SCO5CN.

** California and New York Residents - Please note this alarm is not compliant with your State's 10 Year Sealed Battery Alarm Legislation Requirements.

Why Is My Smoke Alarm Beeping?

Smoke alarms can beep for to the following reasons:

  • Low Battery: This is the most common cause. Most smoke detectors use a chirping sound (usually a single beep every 30-60 seconds) to warn you that the batteries are running low and need to be replaced. Don't wait until the alarm is silent - replace the batteries right away to ensure your smoke alarm continues to function properly.
  • End of Life: Smoke alarms don't last forever. If your smoke detector is beeping constantly or in a different pattern than the low battery chirp, it may be nearing the end of its intended lifespan and should be replaced altogether.
Product Details
  1. Smoke particles of varying number and size are produced in all fires. For maximum protection, use both ionization and photoelectric sensing technologies. Ionization alarms are generally more sensitive to fast flaming fires and photoelectric alarms are generally more sensitive to smoldering fires.
Product Specs
Smoke Alarms
Product Manuals

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PRC700 customer reviews

Overall Rating

11 Reviews
10 customers recommend this product
First Alert Slim Design Battery Operated Smoke and Carbon Monoxide Alarm Reviews
November 27, 2023
Verified Purchase
Aesthetically pleasing alarm

Appears to work like it should. However the differentiator with this alarm is it's physical profile which is more modern and less obtrusive

Kimberly W
September 22, 2021
Verified Purchase
Sound sleep

This was purchased for 2 reasons. I live in a manufactured home and was told that the electrical panel had been recalled because it could catch fire. Since I'm on a fixed income and can't afford the repairs yet and the box is in my bedroom I wanted to be able to sleep without worry. Second, in the event of a hurricane and power outage the generator would be placed outside near my bedroom. Again I feel safe and secure while sleeping.

Scott H
June 2, 2021
Verified Purchase
Slim Line

The guest hates intrusions into her trailer space. Even the smoke detector hung too low. Not anymore! Thank you for this ultra slim alternative

Suzanne Baldrate
December 8, 2020
Verified Purchase
combination alarm

easy to install and works fine in the testing

Brenda Mosher
April 16, 2019
Verified Purchase

This model is a slimmer design than my previous Smoke/CO Alarm. Easy installation. And even came with batteries.

Adriane Appel
January 14, 2019
Verified Purchase
Great Price

I found what I wanted at a more reasonable price by going directly to the product website. Products arrived on time and in perfect condition. Now, if I can just find that drill bit....

TT Capital
January 7, 2019
Verified Purchase
Good Products

Package was delivered earlier than anticipated.

B Connally
September 3, 2018
Verified Purchase
Outdated batteries

When we received on 8/2018 and placed the alarms up, we noticed on back of alarm that the expiration date was Feb. 2016. We contacted the First Alert Store and they were unaware of the date, apologized and made the purchase right. Please check the date on the product. But I will give customer service a 5 star for their quick correction.

We apologize for the expiration error. We're glad that were able to remedy the situation for you ASAP.
Mark Kaufman
August 3, 2018
Verified Purchase
Very Good Product

I received the product and was impressed with the ease of setting it up. I also tested it with a candle it works very well. Couldn't be more happy.

Chris Crozier
August 11, 2017
Verified Purchase
So far so good

Bought 3 from first alert because all the other companies are getting bad reviews for smoke/co2 detectors that don't work for very long.

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