My girlfriend gifted me a wireless thermo ($159AU) that hooked up with my iPhone for Low and Slow cooking so I could make my own Pastrami. The inside temp sensor was 7C different to ambient temp sensor. It was replaced and now is only 4C different. So I bought this temp probe ($20 & 100% spot on temp wise) and all my hassles are gone! Time and temp and the analog gauge on my Kamado Joe (100% spot on) is all I need! Great product and even my girlfriend is using it to make sure all our cooked foods are safe! No stress... Thanks heaps!