... RS232 interface to PC UPSThe specification of UPS (online ups, online unterrupted power,power supplier,ups, online power) as following:CPU microprocessor ... control, monitor the UPS and battery state automaticallyPower management software, graphical displayAVR high accurate and full voltage and frequency ... size (mm)385 x135 x210410 x165 x255 130-280V High Frequency Online UPS