Tripp Lite 5kVA Smart Online Rack / Tower UPS. 5000VA online, double-conversion UPS for server, network and telecommunications equipment. Full-time sine wave output within 2% of selectable 208V and simultaneous 120V AC. Corrects brownouts to 156V and overvoltages to 276V. Frequency regulation locks output power to 50/60Hz (+/-0.2%). Expandable runtime with optional rackmount external battery packs. Dual-conversion UPS converts raw input from AC to DC, then back to perfect sine wave AC output with enhanced protection from harmonic distortion, fast electrical impulses and other hard-to-solve power problems not addressed by other UPS types. Network management interfaces include 2 DB9 ports and SNMPWEBCARD slot. Front panel LEDs and LCD readout with scroll controls support visual monitoring of all major UPS functions. L6-30P plug-in connection; built-in output receptacles include two L6-30R, two L6-20R and twelve 5-15/20R.