APC ATX 2850 Power Supply SUM3000RMXL2U Output Power Capacity 2850 Watts / 3000 VA Control panel LED status display with load and battery bar-graphs and On Line : On Battery : Replace Battery : Overload and Bypass Indicators Interface Port(s) DB-9 RS-232,RJ-45 10/100 Base-T,USB Pre-Installed SmartSlot? Cards AP9631 Surge energy rating 540 Joules Form Factor2U Tower/Rack Mountable