Most promising review: "I am often cooking two to four items at once and this timer rules! It is very easy to use and the alarm sound is loud. It has two magnets on the back to hold it in place on metal surfaces.
One other note, if you are not around when the alarm sounds, you also will know how long you have gone over your time limit as it starts counting (a new count) when it is beeping to alert you." —Laus Deo
Get it on Amazon for $9.88.