HERCOM TELEMATE III is a specific low power type wireless modem. RS-232C interface serial communication can be done wirelessly. The communication is half-duplex communication. The transmission distance is about 300 meters outside, 120 meters indoor. In addition, when combined with the MAKE plus production control display device with communication function, you can create "bulk production status, "configuring production control display devices" or "correlating data with Excel and production management systems.