Designed with usability and comfort at the centre, Bodytrak is the only non-invasive product of its kind on the market. Due to its close proximity to the hypothalamus, the temperature control centre of the body, and since the eardrum receives its blood supply from the carotid artery, the ear is an excellent body site to measure core body temperature and heart rate. This is one of the main reasons why Bodytrak is extremely effective.