This is a GPS,GSM,GPRS base vehicle tracking unit as well as fleet management unit. The unit is less than 3cm x 3cmx1cm in size and has embedded antennas. Units can be upraded from a plain tracking unit to an advanced fleet management system via sms. Down grade the same way. We have excellent and very fast software and mapping to back these units. These units tests itself as many times as needed and reports defecfts to clients and our control rooms. The unit is one word Unique,