I bought this set for a home I'm selling in a 55+ community. I loved how they were the combo detectors (smoke and CO) and had the big button with a 10-year battery and the remote. I believe the new residents will greatly appreciate the ease-of-use for these detectors and will have peace of knowing they won't need to be crawling up on ladders. I read on my with the included papers there is a 5-year warranty. I will definitely get them for my own next home. It took me awhile to link them but that's because I'm not technically savvy. Your videos helped me, along with my determination and I added a 4th detector! The remote instructions had the tiniest font ever, so I had to keep taking a photo with my phone to make it larger to read. Great product and I'm so glad I spent a little bit more to get your product. I like the clean-line design and they almost look like a stereo speaker. I wish they came in other colors, but that might be a regulatory issue?