I am paranoid about chicken and fish being fully cooked when I take it out of the oven. I have the kind of thermometer that changes color but I prefer something that shows a temperature reading, and preferably something that doesn't require batteries (or, if it does, it has long-lasting batteries). I saw the ChefAlarm on Amazon but it looks really complicated. But I'll deal with that if it is accurate. Interested in any recommendations you have.