Online UPS backup system 6-10KVA,high frequency,single phase,LCD display,RS232+USB,external battery bank (optional) Main Features:Online double ... )DisplayLED indicates the status of UPS(LCD is optional)LCD&LED displayAlarmabnormal AC input, low battery,UPS failureProtectionlow battery, overload, over ... backup13/6.525/1429/1569/2670/27: Online UPS backup system (6KVA & 10KVA)