First Alert SM210 / SM210V / SM210L 10-Year Smoke vs First Alert SMI100-AC Hardwired Smoke
Side-by-side specs from each maker.
First Alert SM210 / SM210V / SM210L 10-Year SmokeList price not published
Only the differences are shown.
| First Alert SM210 / SM210V / SM210L 10-Year Smoke | First Alert SMI100-AC Hardwired Smoke | |
|---|---|---|
| Type | Smoke or CO alarm | Smoke or CO alarm |
| Alarm | smoke | smoke |
| Sensor | photoelectric | ionization |
| Power | 10-year battery (lithium metal, not replaceable) | Hardwired with 9V alkaline battery backup (replaceable) |
| Interconnect | Not listed | wired |
| Standards (maker) | Conforms to UL 217 10th Edition Standard | Not listed |
| Replace after | 10 years | Not listed |
First Alert SM210 / SM210V / SM210L 10-Year Smoke
A photoelectric smoke alarm with a sealed 10-year lithium battery and a slim profile. Voice and path-light versions are separate models from the same maker.
- Sealed 10-year battery
- UL 217 10th edition
- The maker lists a lifespan of about 10 years
- Smoke only, no CO sensing
First Alert SMI100-AC Hardwired Smoke
A hardwired ionization smoke alarm with a 9V battery backup that interconnects with other First Alert or BRK hardwired alarms. The maker lists it as the replacement for the 9120B.
- Hardwired interconnect with up to 12 other First Alert or BRK detectors and 6 other compatible devices
- 9V battery backup
- 10 year limited warranty
- Ionization sensing only
- Voice alerts not offered on this model