i got this at wal-mart for a little under 15$ and it seems ok for what i plan on doing with it. one probe with a wire running from probe to thermometer. i may get a second one buf now this is good. anyway, i tested it with an ice slurry and the temp i got was 32.4 degrees. i figured that's the ebst i could do with wet ice and then got a pot of boiling water going. here's where things got a little ambiguous. the water was boiling at a very good roll, and the highest i could get it to was 207.8 - for a brief moment it was at 207.9, but not long enough to call it anything solid. this had me worried that the thermometer is at least 4 degrees off, but maybe altitude plays a factor? the elevation of the town i live in is at 2428 feet - any ideas or conversion formulas?