... 2.GSM Dual-Band 900, 1800 MHz 3.GPRS multi-slot class 10 4.SIM Application Toolkit 5.gsm/gprs module ... MC52i MC52I General Features1,GSM Dual-Band 900, 1800 MHz2,3GPP ... Release 983,GPRS multi-slot class 104,Compliant to GSM phase 2/2+5,Output power: ... via serial interface3,Real time clock with alarm functionality MC52i GSM GPRS module