Based on your current location, we have chosen a store to give you the most up-to-date selections and pricing available.
If this is not your preferred local store, please change store now.
We were unable to identify your local store. Please enter your ZIP Code and select your local store, so we can provide current product and pricing information available for your area.
This item cannot be shipped to the following state(s): AK,GU,HI,PR,VI
Select a Store for more info on inventory and pick up options.
First Alert’s Hardwire Ionization Sensor Smoke Alarm detects flaming fires and runs on a battery backup when your power is out. This alarm will sound if it detects smoke even during power outages. It is made for hardwire installation and uses a 9 Volt backup battery. The ionization sensor detects fast flaming fires that consume combustible materials. Other features include a test and silence button, a latching indicator that remembers which unit initiated the alarm and smart technology that helps reduce false alarms. The 9120B can be connected to (18) devices including, (12) compatible smoke alarms and (6) compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B features a perfect mount system with a gasket-less base for easy installation, a new mounting bracket that keeps the alarm secure over a wide rotation range for perfect alignment and a mounting bracket lock for tamper resistance. A dust cover keeps the unit clean during construction. Engineered for residential and institutional use, this detector is perfect for dormitories and multi-family dwellings. First Alert’s Hardwire Ionization Sensor Smoke Alarm is warranted to the original purchaser for a period of 10-years. First Alert invests time and research into providing dependable and hardworking products. Committed to innovation and value, First Alert improves safety in and around the house.
| Alarm Sensor Type | Ionization | Assembled Depth (in.) | 5.6 in |
| Assembled Height (in.) | 5.6 in | Assembled Width (in.) | 1.9 in |
| Battery Back-Up | Yes | Battery Size | 12V |
| Carbon Monoxide Detector Included | No | Commercial / Residential | Commercial / Residential |
| Connector/Contact Type | 4-Wire | Digital Display | No |
| Electrical Product Type | Smoke Detector | Heat Detector Included | No |
| Returnable | 90-Day | Test/Reset Button | Yes |
| Visible Sensor | No | Voltage (volts) | 120 V |
| Wired or Wireless | Combo |
You will need Adobe® Acrobat® Reader to view PDF documents.
Download
a free copy from the Adobe Web site.
Warranty
For warranty information on this product, please call our Internet Customer Service Center at 1-800-435-4654.
Please allow an additional 3-5 business days for Standard Ground Delivery in the U.S.
If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.
This item is also available for pick up in your local store (FREE) within 4-7 business days, plus order processing time.
Special Financing Available Everyday*
The Home Depot makes home installation easy.
Get a Free ConsultationFind everything you need for your move.
Get StartedThe Home Depot offers afford- able rental rates.
Explore RentalsMore saving. More doing.
On the go.
Visit and like us
on Facebook
Stay connected with us
on Twitter
Follow our Pinterest boards
for projects and inspiration
Get the latest products,
project tips and ideas
View DIY project and
product videos
Can't find what you're
looking for? Please call us:
1-800-HOME-DEPOT
1-800-(466-3337)
† Local store prices may vary from those displayed. Products shown as available are normally stocked but inventory levels cannot be guaranteed. © 2000-2013 Homer TLC, Inc. All Rights Reserved. Use of this site is subject to certain Terms of Use which constitute a legal agreement between you and The Home Depot U.S.A. Inc.
