what is gps tracking device ? how does it work ?

A GPS following unit is a route gadget regularly conveyed by a moving vehicle or individual that uses the Global Positioning System to follow the gadget's developments and decide its area.

GPS works by giving data on careful area. ... A GPS following framework utilizes the Global Navigation Satellite System (GNSS) arrange. This system joins a scope of satellites that utilization microwave flag that are transmitted to GPS gadgets to give data on area, vehicle speed, time and heading.