First Alert Smoke/CO Alarm 3-Pack for $79.99

Costco has the First Alert Precision Detection 10-Year Battery Smoke/CO Alarm for $79.99, with a $20 manufacturer’s savings valid from 8/1/26 through 8/31/26. This 3-pack provides reliable 2-in-1 protection against both smoke and carbon monoxide, with a sealed 10-year battery eliminating the need for replacements and low battery chirps. The alarm also features an end-of-life warning and a 10-year warranty. While the $20 discount is temporary and the deal is available for a limited time, the price remains competitive considering the ongoing savings and bundled value.