Anonymous6 years ago-303Which display value is the decisive plus or minus.Show in original language (German)christian.bolliger6 years ago • purchased this product+143purchased this product Helpful answerI'm sorry, I don't understand the question. My Breurer HM 16 doesn't have a plus or minus button. I put the battery in and that was it and I read the temperature (C or F) and the humidity and I am super happy with the device.Show in original language (German)Comment