The E800-DTU (Z2530-485-27) is a ZigBee-based wireless modem with various functions such as transparent transmission, protocol transmission, and AT configuration etc. As a communication medium, wireless data transmission modem has certain scope of application same as fiber, microwave and bright line. It provides real-time, reliable data transmission of monitoring signals in private networks under special conditions, featuring low cost, convenient installation and maintenance, strong diffraction ability, flexible networking structure and long coverage, and suitable for the occasions with many points while scattered and complex geographical environment. It can be connected to data terminals such as PLC, RTU, rain gauge and level gauge.