The most popular FIRST ALERT products:

CO400
FA168CPS
FA145C
FA210RF
READYGUARD
FA1340C
FA148CP (8 02)
FA2100C
FA148C-CN
FA168C
CO410
SA320
READYGUARD-REN
SA320CN
FA148C
FA1620
FA848C
FA168C-CN (7 01)
FA120C
FA148CP-CN
FA260RF
FA1220CV
FA162C
FA162C (4 99)
FA1600CA
FA148CP (7 01)
FA1600CB
FA168C (7 01)
FA168C-CN
FA1600C
CO600
FA120C (9 96)
FA1340C-UL
FA142C
FA2000C
READYGUARD-R
FA148CP-CN (7 01)
FA148CP