This is the kind I have: <a href="http://www.bedbathandbeyond.com/product.asp?order_num=-1&SKU=11720307" target="_blank">http://www.bedbathandbeyond.com/product.asp?order_num=-1&SKU=11720307</a> It's pretty foolproof. You set the internal temperature you want, and then set the alarm. The alarm goes off when the temperature has been reached.