Uninterruptible power supply effective power 500 w apparent power 750 va outputs 6 x iec 320 c13 2 x iec jumpers inputs 1 x iec 320 c14 interfaces usb rs 232 nominal voltage 230 v bridging time 5 min bridging time at minimum load 1032 minutes voltage waveform sine wave frequency range 47 53 hz yield in 982 output voltage 230 v battery technology lead acid number of batteries 1 battery charging time 3 h protective measures power failure