Price reduced from $50 to $40 buy multiples and get a bigger DISCOUNT! Kidde Worry Free Living Area 10 Yr Smoke and CO Alarm - 10 Yr sealed Battery Talking alarm: voice messages identify different dangers, warning clearly alerts you if the unit has detected smoke, CO or a low battery Worry free; lasts 10 years Sealed lithium battery lasts for life of alarm 2 in 1 unit Ideal for all living areas Detects fires quickly and reduces false alarms Alarm will sound an end of life signal to remind you when it is time to replace the alarm Photoelectric technology Price is $60 at Home Depot + Tax = $67.20 Your price for a new sealed unopened pkg is $40 and if you buy multiples I'll add an extra discount. https://www.homedepot.ca/en/home/p.worry-free-living-area-10-yr-smoke-and-co-alarm----10-yr-sealed-battery.1000775560.html