The GPRS DTU is a wireless data transfer unit that embedded with High reliable ARM9 MCU and industrial GPRS Engine inside. The GPRS DTU is special for transparent transferring data between RS485 port and internet over GPRS wireless network. The GPRS wireless communication has become widely used of industrials and utilities and many customers are requiring reliable, flexible and cost-effective data channel to build their information system. Many applications such as Remote device monitoring, remote automatic metering system, ATM, data logging system, POS, SCADA and surveillance system will require data channels covered all country.