This is a 2.4GHz Wireless Complete Module.
Wireless communication become extremely easy.
MF RC522 is applied to the highly integrated read and write 13.56MHz contactless communication card chip,
The SIEMENS TC35 is a standard AT commands Based GSM module, you can easily apply it with your own embedded system to creat a GSM wireless based data transfer module .Support Arduino!
The GPRS Shield is based on SIM900 module from SIMCOM and compatible with Arduino and its clones, it provides you a way to communicate using the GSM cell phone network.