The full kit of A6 GSM/GPRS has an onboard CH340 IC for serial to USB functionality. A keyboard , an LCD , relay & buzzer are also provided.An MCU of STC 8051 family is onboard which is factory preloaded with demo code. 6 way DIP switch seen near the MCU decides the connection between USB -- MCU..
With this GPS Shield populated with GPS module from rhydoLABZ you can add GPS functionality to your Arduino or you can receive the NMEA data on your PC/Laptop with a easiness of sliding a switch. A footprints for popular EM-406 GPS receiver , EM-408,PA4 GPS and EB-85A ..