Kidde AC Powered Plug-In CO/Gas Alarm w/ Battery Backup on QVC

Protect you and your family from two threats with the 900-0113 plug-in carbon monoxide and explosive gas alarm (complete with a 9V battery back-up). From Kidde.

[@MichaelBlake-oi9pu]

I bought the kiddie plug in with backup AA batteries. I have the stove on with gas running for 60 seconds. The kiddie carbon monoxide was plug in the kitchen and it did not went off. This device seems useless.