Just got an email from Thermoworks about a new product named Billows that attaches to their Signals remote thermometer system. It is a fan that is supposed to be able to help control the temp of a smoker that does not have a controller. More to come when it gets released to the public soon. And I think it was only about $60 if you already have the Signals. May be a cheap way to get some temp control on those barrel smokers or weber kettles, etc if you already own Signals.