UPS850VA/450Watts,AVR, CPU control,SMT PCB, LCD display,USB,4 battery backup &2 surge protection,12/9Ah battery ... 60SecondsInterface Port(s)InterfaceRS-232/USBControl SoftwareUPSlion2000Cold-start CapabilityYesProtectionSurge Protection and FilteringHigh Voltage,Low Voltage,Surge,SpikeOverload Protection120%-150%Battery Low ... Box(mm)350×160×255Unit Weight(kgs)7.4 LCD UPS DIGITAL 850VA