What are the “Iron Man-like” orbs on the combine shirts?

Some of you may have noticed the orb-like objects that are attached to the combine shirts that light up. Some have likened them to the Iron Man “Arc Reactor”, but it’s pictured above. So, what the heck is it?
After doing a little research, I’ve discovered that it is new shirt known as the Under Armour E-39. The shirt includes an electric monitor that includes an accelerometer (you have seen this in smart phones), measures breathing rate, body temperature, heart rate, and may other measurables.
It is marketed as being able to provide athletes, coaches, trainers, and scouts with real time performance measurement as well as valuable medical information to help prevent and/or detect serious health conditions (such as heart ailments).
Here is a short video with some more detail on the new technology: