Disconnected battery notification - Warns when a battery is not available to provide backup power. Excellent footprint - Small UPS footprint provides maximum usage of valuable electrical room floorspace Automatic self-test - Periodic battery self-test ensures early detection of a battery that needs to be replaced. Audible alarms - Provides notification of changing utility power and UPS power conditions Fast battery charging capability - Allows for reduced battery recharge time, prevents disturbances on the distribution system by correcting the power factor, protects the battery against damage caused by deep discharge and provides backfeed protection. Automatic internal bypass - Pure static bypass switch without bridging contactor securing a fast and reliable transfer to and from bypass, rated for 125% nominal load. Field-replaceable power distribution panel - Ensures compatibility with equipment that has different plug types. Automatic restart of loads after UPS shutdown - Automatically starts up the connected equipment upon the return of utility power. Double conversion on-line topology - Guarantees a consistently high level of power quality. Any disturbances on the distribution waveform are regenerated via the zero transfer time AC to DC then DC to AC conversion process. The battery is only used as a back-up source. Advanced electrical features - Excellent power conditioning, very low harmonic distortion through IGBT rectifier, input power factor correction, and high power efficiency This product is heavy and/or oversized and may need more than one person to handle. Helps save energy - designed to limit the energy used by other products, potentially helping you reduce your carbon footprint and save money.