POWER CHARGERModel: NS-1220CUser ManualSpecifications and Features: 20 Amp Total Max.Power output 15A Max.Charger output 5A Max. Net weight, only 4.63 lbs/2.1kg Dimensions 252*54*190 m/m (W*H*D) Over Voltage protection Over Current protection Quiet Internal Cooling Fan Input Voltage: Selectable AC input voltage-110 Vac at 50/60Hz-220 Vac at 50/60Hz Super Regulation:Works with AC input from 90 to 132 Vac or from 178 to 264 Vac. Back-up Power Supply System