What does the temperature measure indicate?

What does the temperature measure indicate?

The linear active thermister temperature sensor measures near-body temperature which is influenced by both the wearer and environment.  GENEActiv Original, Action and Wireless have a range of 0 – 60 degrees centigrade taking measurements a minimum of every 30 seconds.

GENEActiv Sleep has an external stainless steel temperature sensor, providing direct skin temperature data recordings.