Requiring only two rack spaces (2U) in a standard rack enclosure, the SmartOnline® UPS systems protect mission-critical equipment against data loss, downtime and equipment damage due to power outages, voltage fluctuations and transient surges. Featuring true on-line operation with pure sine wave output and zero transfer time to battery, they provide the highest level of power protection for mission-critical equipment. Includes outlets that are individually controllable to reboot select equipment on demand or maximize battery runtime for mission-critical equipment. Internal batteries support connected equipment during blackouts, and runtime is expandable with optional external battery packs. USB and DB9 communication ports support messaging of detailed UPS operational parameters and line power status. Included PowerAlert UPS monitoring and unattended shutdown software provides management support for an unlimited number of network UPS systems. Protection Type: Single-Line Tel/DSL or Network Ethernet; System VA: 750 VA; Backup Time at Half Load: 11 minutes @ 300 Watts.