... port 2 RS232 TF card RS3000C1 is a multifunctional GSM/GPRS GPS car tracker,car alarm system to monitor ... security.General SpecificationMeasurement 102x68x42mm, 550gCellular Modem Siemens or Huawei GSM module Network GSM, GPRS and SMS ; Voice Headset Kit AvailableMessages SMS, ... Encrypted Protocol ; GPRS, TCP/IP over PPPGPS module Holux M89 ...