Uninterruptible power supply effective power 500 w apparent power 750 va outputs 2 x iec jumpers 4 x iec 320 c13 inputs 1 x iec 320 c14 interfaces rj 45 usb voltage waveform sine wave frequency range 50 60 hz input voltage 160 286 output voltage 230 v battery technology lead acid battery charging time 3 h special features cold start sealed floating electrolyte protective measures surge protection power failure protection case rack mountable fu