The BurnerAlert is an insert that you can add to your stove knobs that beeps and blinks when you've left your stove on for too long.
It works on a wide range of different gas and electric stoves, and the installation is simple. It takes about five minutes to get up and running.
If you're worried about the safety of a loved one who's living at home alone, this is a great tool to help put your mind at ease.