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 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.
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!