Bests & Worsts Reviews from Amazon

I don't know why I didn't have the sense to look at the date when this purchase arrived BUT I did just get a chance to see it (at 3:30 am) after it went off and a firefighter informed me that my detector was over ten years old. It is completely irresponsible of Amazon to sell such a device when it's over ten years old. Don't even bother purchasing this.