SainSmart GPS GPRS GSM Quad-Band SIMCom SIM928 Development Board 850M/900M/1800M/1900MHz SIM908 module is a high performance industrial GSM/GPRS/GPS module. The interfaces of this development board are rich, perfect functions, especially is suitable for the need to voice/SMS/GPRS/GPS navigation data service of all kinds of fields. SIM908 development board is not only beautiful, but also completed function, rich interface. The module size (not including antenna part) is 77.978 mm * 73.787 mm. The module has mounting holes which are very small, and conducive to install and can be easily applied to all kinds of product design.