Got my 3 yesterday. They work fine and all show the same temp when placed side by side. Appears these must have 2 temp sensors. One on the probe and another in the unit. Cause while the unit is on, if you tap the pwr button it will go between "in" and "out". "in" appears to be the probe. "out" appears to be the unit itself. An extra feature thats not mentioned. Hah, now what do I win?