The Maverick ET-733 is the newest version of the one DivotMaker suggested. I own the ET-732 and agree that it's a must-have for cooking. They're both available at Amazon. I run the wires out of the vent hole on the top of the cooker and it works perfectly. If you use the above thermometer, you'll be surprised how much a Smokin-It #2 temperature varies during a cook. It's not uncommon for a setting of 225° to drop by 15° before the heat comes back on. I'm a compulsive personality, and knowing what's going on in the oven and with the meat makes planning dinners, parties, etc. a much more enjoyable and reliable experience!