Let me first say I am surprised by how many people on here seem to use these dual-zone wireless gadgets for watching temps. Personally I went with a slightly different method. When I bought the smoker I went to an industrial supply store (having experience with gauges in the oil field) and bought a couple high quality bi-metal (analog) dial gauges to watch the cooking temperature. If I want to check the temperature without "babysitting" I take a gander out the back kitchen window, lol. To check my food temperature I bought the one and only NSF rated food thermometer Target had for a whopping $15. I do have to open the smoker for a minute or so to check my food using this type of thermometer however, my smoker will recover the temperature within just a few minutes so because of the low cost and good accuracy I will not complain. Those industrial gauges I have in the smoker cost a few pennies more at $45/ea. so I'm not trying to imply my method saves money over those wireless setups, only sharing my method.