2-Pack First Alert Smoke & Fire Alarms (10 Year Life)

I have an unopened "Slim Design" 2-pack we bought at Costco a couple of
years ago. The batteries are supposed to last 10 years, but the life of
these alarms (per the fire dept) is 10 years from the manufacture date, so
these might only have 7-8 years of life.

I want to include this note because I was "last week-years old" when I
learned of this.

*IMPORTANT: It is never acceptable to replace Code required hard-wired
smoke alarms with ANY type of battery-only smoke alarm.*

 I have also attached a PDF with the county smoke alarm requirements, but
not sure if it will remain attached when it goes to the list.

*Specify a 4-hour date/time window for porch pickup.*