First Alert SMI100-AC Smoke Detector
Best hardwired safety solution for homeowners seeking easy installation.
This hardwired unit is the set-it-and-forget-it standard for home safety. By tapping directly into your electrical system, it eliminates the anxiety of dead batteries, while the photoelectric sensor offers superior detection for the most common types of household fires. It is the reliable, invisible guardian every home needs.
$19.99
More SMI100 Series options
Who it's for
- Homeowners seeking a minimalist look that complements modern interior decor
- Safety-conscious residents wanting uninterrupted monitoring regardless of electrical stability
- DIY enthusiasts looking for a quick and hassle-free installation process
Who should skip it
- Families requiring comprehensive protection against all types of fire hazards
- Cooks who frequently use the kitchen near installed detector locations
- Owners in older buildings without pre-existing hardwired systems
Performance breakdown
Reliability
Hardwired connection ensures constant power without relying solely on battery life.
Detection Accuracy
Photoelectric sensors excel at identifying slow-burning, smoldering fires quickly.
Installation Ease
Requires basic electrical knowledge, making it slightly more involved than battery-only units.
Maintenance Simplicity
Standard 9V battery backup is easy to swap during routine checks.
Design Integration
Low-profile white housing disappears seamlessly into standard ceiling and wall finishes.
Safety Versatility
Lacks carbon monoxide detection, limiting its role to fire safety only.
Key Specs
Power Source
Hardwired (120V) with Battery Backup
Detection Technology
Photoelectric
Battery Type
9V (Included)
Mounting Type
Ceiling or Wall
Carbon Monoxide Detection
No
Know before you buy
Still have a question?
Ask Metto anything about the First Alert SMI100-AC Smoke Detector before you decide.