The product is fully compatible with SMS / GPRS / Internet data transmission functions, making it more widely used in large-scale monitoring, emergency programming, location-based services, traffic security, and many other areas of management. Detailed description: It is based on GSM / GPRS (850/900/1800/1900MHZ) wireless telecommunication Internet and global GPS satellite positioning system, track by various monitor software and real-time global track on map through monitor software on your PC; track through your PDA mobile phone and google earth.