Bodytrak® is unique. It exploits the only body site from which all vital signs can be measured. From one small non-invasive, in-ear device, metrics including core body temperature, heart rate, VO2 and motion (speed, distance, cadence) are sent wirelessly to the user in real-time via a smart phone, smart watch or internet hub. By utilising miniature components, Bodytrak® also provides two-way communications, music playback and ambient sound transparency to meet the different needs of the sport, defence and telehealth markets. Since Bodytrak® accesses the ear, it detects changes in body physiology rapidly and accurately due to its close proximity to the brain, more effectively than some competing devices which measure at the periphery of the body.