... monthly fee 1. GENERAL INTRODUCTION: The ExtremTrac turnkey tracking software EX300 is a friendly design for an easy and ... data from ET700/ET3500/MC300, etc trackers, and transmit to PC mapping software EX300. The software uses the RS232 serial port to communicate ... : ET700/GP3000/ET3500/MC300, etc- GSM Modem: MD200- Tracking Software: EX300- Maps: Online Google map, MS MapPoint, Google Earth, ...