Uninterruptible power supply effective power 500 w apparent power 750 va outputs 4 x iec 320 c13 interfaces rj 45 usb rs 232 battery technology lead acid battery charging time 3 h protective measures alarm function operating temperature 0 40 c permitted humidity when in use 0 95 display led dimensions hxwxd 24 1 x 54 6 x 58 4 cm weight 17 kg