Mobile transmitting and receiving units for remote monitoring of the location of an individual or group of individuals; emergency response system consisting of a wireless alert transceiver that can be worn on the body; computer application software that allows transmission of electronic data, namely, text, audio, image and video files relating to a user wearing a wearable tracking device; online computer network for retrieving and storing electronic data, namely, text audio, image and video files transmitted from a wireless alert device; portable wearable tracking system, namely, real time tracking device for determining proximity with other tracking devices