I liked this basal thermometer just fine until it stopped working. It showed the low battery symbol, and I replaced it with the kind the instructions said to use. Unfortunately it still does not work. It keeps showing the error message, and the instructions are so helpful: "If ERR displays and measurement is not attainable, the unit must be replaced." I might have registered for the warranty if I had known this thermometer would stop working after just three months.Get more detail about Mabis Digital Basal Thermometer.
