The First Alert Hardwire Combination Smoke/Carbon Monoxide Alarm wires directly into your home's electrical system. In the event of a power outage, this alarm has been equipped with a 9V battery backup to provide optimal protection. The realization of ionization technology combined with an electrochemical sensor ensure optimal safety. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms brought on by cooking smoke and shower steam. This button also allows you to test the functionality of your alarm. This alarm carries a 10 year limited warranty and complies with new construction requirements.
- Electrochemical Carbon Monoxide Sensor - the most accurate sensor available as compared to other sensing technologies
- 9V Alkaline Battery Backup
- Latching alarm indicator - remembers which unit initiated an alarm
- Two silence features - can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarm
- End of Life Signal provides audible notification alarms needs to be replaced
- Intelligent Sensing TechnologyTM helps reduce the number of nuisance alarms
- Perfect Mount - allows for easy alignment of alarm
- Dust Cover
- 10-Years Limited Warranty
Easy Installation/Maintenance - First Alert SC9120B carbon monoxide alarm & smoke detector Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the side load battery compartment. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a "Quick-Connect" wiring harness. Installation is quick, easy and cost effective.
All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. They use the new UL mandated repeating 85-decibel alarm horn pattern. 10-year limited warranty. For a full list of states and cities requiring 10 Year alarms click here.
Same Day Shipping
All orders (of in-stock items) that are placed Monday through Friday before 2 PM EST will ship the same day.
Free Shipping - Standard Shipping
We offer free standard shipping on all products. No minimum required.
Express Shipping is available at an additional fee in the US (Except Hawaii and US territories) Orders (of in-stock items) placed before 12:00 pm EST, Monday-Friday will be processed and shipped the same day. Orders placed after 12:00 pm EST call in to ensure same day shipping. Your package will arrive the within 2-4 business day, from the date your package was shipped. Shipping rates may vary for products weighing more than 25 lb.
Overnight Shipping is available at an additional fee in the US (Except Hawaii and US territories) Orders (of in-stock items) placed before 12:00 pm EST, Monday-Friday will be processed and shipped the same day. Orders placed after 12:00 pm EST call in to ensure same day shipping. Your package will arrive the next business day, from the date your package was shipped. Shipping rates may vary for products weighing more than 25 lb.
30 day hassle free returns
If you are not completly satisfied with your purchase you may return it within 30 days of delivery.
Share this Product
More from this collection
Questions & AnswersAsk a Question
Can this unit be interconnected?
Yes the SC9120B is an interconnected alarm
My alarm #9120B is chirping 5 times. I replaced the battery but it is still chirping every few minutes. What is the problem?
It is likely that the reason your smoke alarm keeps chirping and beeping is that the battery is low and your product has reached the end of its life
Does this product include adapter plugs?
Yes. Each unit includes the 6-to-7 inch 3-wire jumper cable (most systems only use two of the wires: the + & -). The rectangular connector plugs into the sensor, and the wires are typically connected to the house wiring via an electrical wire nut (not included, unless you are replacing an existing unit in your house already wired with one - if so then reuse the nut if in good condition). The 9-volt batteries are for backup - Be safe with the electrical wiring and good luck - get professional help if you need it
How do I replace the battery?
The alarm does not need to be removed to in order to replace the battery. The battery compartment door opens from the side of the unit.
Chirping 3 times than stops a little minute or 2than chirps again might stop for a little longer than starts again. We changed the battery at least we put one in the compartment because you can not tell if it is in the slots. We cannot get it to stop chirping.
The chirp pattern described indicates that the alarm malfunctioned and it needs to be replaced immediately.