The XU315 DC is a battery backup power conditioner with surge protection (up to 6000V) and AC regenerator. At full load, the batteries will offer 5 minutes of run time while at half load, you will get 12 mins of run time, which is more then enough time to properly shut down critical components or hook them up to an alternative power supply. It’s AC regenerator feature is quite a bonus (other than its outstanding surge protection and battery backup) with this unit as it proves to be crucial with AC sensitive components like turntable, CD players, DAC etc. The pure sine wave it re-creates is a great benefit to these AC sensitive components. If you want a longer battery backup time, you can always connect additional battery pack via the rear battery connector. The on board fan stays on 24/7 so you may need to figure a good place to install this if your setup is not installed inside a custom inwall rack (its not loud but you can hear a soft whirring sound of the fan).
Cosmetically, the unit looks good. Just minor scuff marks here and there from being used as a DEMO. We have the original box and accs that comes with it.