Hadn't heard of this new style/method.
Guess that's why the give away.
The big deal - no mercury - not even in a battery.
Pretty cool.
very texty explaination
Precision Phase Change.
Matrix of small green dots with different melt points each w/2 mg of material.
Last dot to turn black (indicating material melted) indicates temp.
Oral or Axillary (Mouth or arm pit?)
Looks like 2 sets of matrix - Fahrenheit and Celsius
Available at retail under Vicks brand.