The GPRS/GSM Application Kit comes with a Spider SA-GL Quad Band GSM/GPRS cellular modem from Enfora. The modem provides wireless communication support for cellular-based applications. The kit is based around a 29.4-MHz RabbitCore RCM 3100 module with 512 kbytes of RAM and 512 kbytes of flash. It also includes an LCD/keypad module. The kit is priced at $649. It comes with a royalty-free TCP/IP stack and Point-to-Point Protocol module plus the company's Dynamic C with TCP/IP stack.