I have an old Lavalock ATC2 temp controller on my 18 WSM that is just over five years old. I used it on a drum before that. No Bluetooth, 1 pit temp probe, 3 meat probes. Came with a blower fan. Very simple to operate and the probe temperatures match more expensive thermometers. It will.hold cook temperature within 25 degrees F. Probes are large diameter, but not braided stainless cables, so they discolored over time. It has served me well and made a lot of good food. Currently this unit Is about $157 USD.