I just bought 2 smart bbq remoted digital thermos at wally world on clearance for $11 each. I tried one out the other day on my new drum for a season/burn. My regular dial thermo read 250 deg while the digital read 350. Figured great, I just bought two of these cheap digitals and they're gonna suck. Well I figured I should boil some water and test them, turns out the digitals are right on and the mechanical one is 100 deg low. Good thing I never used that one before!!!! So, since theres no adjustment on the dial, in the trash it went. Gonna have to make a habit out of testing them when I first buy them instead of letting them sit for a year and losing the reciept!