... Frequency:50 or 60Hz 3.Use in home,outdoor 4.Input12/24,output 110/220/230 1200W DC to AC UPS power inverter ... with Battery Charger,used in home ,outdoor All ... voltage alarm (unloaded): 10.4-11.0v Low voltage shut-down range (unloaded): 9.7 ... ,USA,African ,Russia ,Australiaetc. and our power inverter serials enjoy better reputation .With reliable quality and ...