*onduleur MIRAGE UPS-850VA -Off-mode charging . -cold start function . -inverter compatible . -boost and buck AVR for voltage stabilization . -excellent microprocessor control guarantees night reliability . *parameters : -model :ups-850v . input voltage :145vac-290vac . -output voltage:195vac-255vac . -output wave from :sine wave under main supply stepped wave under . -output frequency :50hz . -battery rating :12v/7ah . -backup time 10-15 minutes . -noise level :less than 45db . -operating temperature :0-45 deg c . -humidity :10 to 90 % non condensing . -color box dimension ( mm) . -weight :4.5 kg .