Our smoke alarms in the house keep going off for no reason and also have some warnings flashing, but we dont have the manuals for them and i cant find them online anywhere. To be on the safe side we decided to replace them, we were going to go for some more standard ones, but i have always liked the looked of the Nest Protect ones, so i decided to get 2 of them. They were easy to install and configure and took less than 10mins each.