... surge voltage, harmonic distortion, clutter immunity, and frequency fluctuation etc., delivering safe and reliable power supply ... N+X Parallel RedundancyTechnical specification for high frequency online UPS DX6K-DX3120KL: Online UPS MODELDX6KDX10KDX6KLDX10KLDX3110KLDX3115KLDX3120KLCAPACITYVA ... DisplayUPS status, I/P & O/P voltage& frequency, Battery voltage, Battery capacity, Loading, Fault codeAudible ...