I bought one of these a few years ago. There’s a switch on the back that flips the display from Fahrenheit to Celsius and back. The display is steady when it’s in Celsius, but it flickers back and forth between Celsius and Fahrenheit when it’s on the Fahrenheit side.
Aside from that one issue, I’ve found it to be an exceptionally reliable and handy device. There’s even a magnet on the back so you can stick it to the fridge when you’re not using it or the range hood when you are.
CIA Digital Probe Thermometer and Timer
by Culinary Institute of America
3.9 out of 5 stars 16 customer reviews
List Price: $26.00
Price: $12.49 + $4.69 shipping
from the mothership. cheaper on shipping and price
http://www.amazon.com/CIA-Digital-Probe-Thermometer-Timer/dp/B003L7JBYU