Uninterruptible power supply effective power 420 w apparent power 650 va outputs 4 x iec 320 c13 inputs 1 x iec 320 c14 interfaces rs 232 usb nominal voltage 230 v voltage waveform sine wave frequency range 50 60 hz input voltage 160 294 protective measures surge protection power failure protection case tower manufacturers warranty 3 years noise emission 40 db display lcd colour black dimensions hxwxd 23 x 15 x 34 5 cm weight 78 kg