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The First Alert Carbon Monoxide and Smoke Detector Combo Pack allows you to maximize overall protection in one very affordable package. First Alert Battery Operated Smoke Alarms utilize Ionization Smoke Sensing Technology that's ideal in identifying flaming fires. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms and testing the functionality of your alarm. Featuring an increased nod to safety with an 85- decibel sound output, these alarms feature a 10 year limited warranty.
First Alert Carbon Monoxide Alarms utilize an Electrochemical Sensor that's proven to be the most accurate technology available in detecting CO. Sleek and compact in design, the model requires no additional installation. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms and testing the functionality of your alarm. An End of Life Timer has also been included to alert owners of battery replacement. First Alert Carbon Monoxide Alarms feature a 5 year limited warranty.
This combo pack is for you if:
Where To Place Carbon Monoxide Alarms: One on every level of the home and one in each sleeping area.
Where To Place Smoke Alarms: One in every bedroom, and at least one on every level of the home.
First Alert Carbon Monoxide Alarm CO400 and First Alert Smoke Detector SA303
* California and New York Residents - Please note this alarm is not compliant with your State's 10 Year Sealed Battery Alarm Legislation Requirements.
Actual battery service life depends on the particular design of your smoke or carbon monoxide alarm and the environment in which it is installed. All kinds of alarm batteries specified in the user's manual are acceptable replacement batteries. Regardless of the manufacturer's suggested battery life, you MUST replace the batteries immediately once the unit starts "chirping" (the "low battery warning"). It is recommended that you change the batteries in your alarms when you change your clocks for daylight saving time. Also consider replacing your current alarms with 10-Year Life Alarms that never require a costly battery replacement for the ten year life of the alarm. This 10-Year series is available in smoke, carbon monoxide and combination alarms.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.
Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.
If it's time to replace your alarms, consider the NEW 10-Year Life series and never have to worry about a battery replacement for the life of the alarm.10-Year alarms are available in smoke, carbon monoxide and combination alarms.
We make it as easy as possible to ensure you get the lowest prices available:
Average score based on 24 reviews
- Reviewed: 01/10/2019 by Teresa Swoager
Easy to install, tested as directions said.
- Reviewed: 11/21/2017 by William Moore
A great deal!
I have used this same smoke detector before which had a permanent battery, so I was glad it was still available even though now the battery is user replaceable. The CO Detector is new to me, so I'm hoping it will offer another layer of protection in my bedroom. First Alert products are very well made and this combo pack just works for me! Thanks!
- Reviewed: 08/20/2017 by James La Briola
Install was very fast 5 stars.
- Reviewed: 08/15/2017 by James La Briola
Only use First Alert excellent products
- Reviewed: 02/27/2017 by Stephen Carlson
Great deal for the price. Purchased 3 combo units.had issue with one of the carbon monoxide units defective. Was sent another. know see if i get credited to charge.im very satisfied with units
- Reviewed: 10/10/2015 by Diane Outeiral
Easy to install, instructions clear, batteries. Received in a flash. What more do I need.
- Reviewed: 10/02/2015 by Diane Outeiral
The Value Pack
Good price, easy to install, shipped super fast. What more could I want.
- Reviewed: 06/30/2015 by Cory Sims
Great Deal and Product
Easy to install and came exactly as described! Great product!
- Reviewed: 06/16/2015 by William Zielinski
Co2 and Smoke
Great quality and reliability.
- Reviewed: 02/09/2014 by Jim Cairns
works as expected