First Alert Hardwired Smoke Alarm with Battery Backup 9120B6CP
- 6 pack contractor set
- Ionization sensor
- 85 dB alarm
- 120 V hardwired, 9 V battery backup
- Interconnects with compatible BRK or First Alert alarms
- 10 year warranty
- Latching indicator shows which unit set off the alarm
Updated 23 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A six pack of hardwired ionization smoke alarms with battery backup and interconnection for a single family home. The model number and power source fields conflict with the title.
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ASIN: B000KKHWLUModel: SMI100-AC
Overview
A single family residence with a hardwired system is the setting for this contractor six pack of ionization alarms. A single button silences nuisance alarms and tests the unit, and lights show when smoke is detected.
The backup battery covers outages, and the interconnect makes all linked alarms sound together. The model number differs from the title, and the power source field reads battery powered.
Who it's for
A builder or homeowner replacing or adding hardwired alarms across one home gets a multipack with interconnection. Buyers who prefer photoelectric sensing, or who have no hardwired circuit, should look at other models.
Pros and cons
- Six alarms in one pack
- Battery backup for outages
- Interconnects with compatible alarms
- Latching alarm indicator
- Ionization sensor only
- Model number differs from the title
- Power source field says battery powered
Performance notes
An ionization sensor responds to the tiny particles from fast flaming fires, while the alarm sounds at a loud, rated volume. Wired interconnection passes the signal to every compatible unit in the home, and the latching indicator shows which unit started the alarm after conditions clear.
Specifications
| Brand | First Alert |
|---|---|
| Model | SMI100-AC |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.9"D x 5.6"W x 5.6"H |
| Power & efficiency | |
| Power Source | Battery Powered |
| Construction & materials | |
| Color | White |
| Enclosure Material | Plastic |
| Compatibility & installation | |
| Compatible Devices | BRK or First Alert smoke detectors |
| Included components | |
| Unit Count | 6 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10 year |
| Other details | |
| Alarm | Audible |
| BuiltIn Media | First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack |
| Item Type Name | Smoke Alarm |
| Mfr Part Number | 9120B6CP |
| Operating Humidity | 10-95% RH |
| Product Style | Standard Detection |
| Sensor Type | Ionization |
Frequently asked questions
Is the First Alert six pack a photoelectric alarm?
No. The sensor type is ionization, which the description ties to fast flaming fires.
Do these alarms connect to each other?
Yes. They connect to compatible BRK or First Alert alarms within a single family residence, and when one sounds, all sound.
What does the description say about wiring?
It notes the product is hardwired and advises checking the wiring polarity and that all wire nut connections are secure.
How long is the warranty?
10 years, according to the specs.