The Online UPS OL2000HV 2U 2KVA (2000VA) Professional Online UPS unit continuously filters wall power through the battery system. Since the attached electronics run completely off the battery (that are always topped off by the external power supply), there is never a single millisecond of power interruption when there is power loss or voltage regulation issues. The OL2000HV Online UPS unit thus acts as an electronic firewall between your devices and the outside world by stabilizing all the electricity to which your devices are exposed. The OL2000HV UPS has one USB port and one Serial port that allow connection and communication between the UPS and the connected computer. Power management software installed on the connected computer(s) gives IT professionals the tools they need to easily monitor and manage their backup power. This advanced software allows users to access vital UPS battery conditions, load levels, and runtime information as well as provide unattended shut down of network computers and virtual machines connected to a battery backup during a power event. Data Sheet Manual