OKY3276 is a GSM/GPRS modem produced by OKYSTAR Technology. It is an industry-grade, reliable, low-cost solution designed to enable applications to transfer data to and from devices over the GSM/GPRS network. This modem is stackable up to 16 ports, has 2 outputs and 4 inputs, supports AT command, is highly configurable and interfaced with the RS-232 line, and features quad-band GSM/GPRS 850/900/1800/1900 MHz. It is also capable of text messaging, GPRS Class 12 data transfer, and has an integrated SIM card reader.