The HP R3000 UPS is a high power-density solution, designed for customers who want to provide power protection in space-constrained rack enterprise environments.This leading edge Uninterruptible Power System, R3000, features the industry"s first 2U, rackmount design offering up to 2700 watts of true power - unprecedented power density! The R3000 uses a unique transformer-less technology, where high performance Digital Signal Processor (DSP) controllers replace bulky transformers. Through this advanced technology, the R3000 offers several benefits including increased power efficiency and smaller foot-print with less weight.In addition, the HP R3000 UPS has the capability to be connected to optional Extended Runtime Module (ERM). Customers can further increase the runtime on their HP R3000 UPS by using this ERM. The HP UPS "models denote "Extended Runtime Capable" UPS models.