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INPUT Voltage : 220-230 VAC Voltage Range : "110 VAC - 270 VAC OR 110 VAC -280 VAC (Wide input window) ; 140 VAC - 260 VAC OR 150 VAC -270 VAC (Normal input window)" Frequency Range : 60/50Hz (Auto Sensing) OUTPUT Voltage : 220-230Vac Voltage Regulation : -10% ~ +10% EFFICIENCY Normal Mode : 95% AVR Mode : 92% PROTECTIONS Delay Time : 3 minutes or 10 Seconds Full Protection : Over-voltage, under-voltage, over-heat, and over current Protection INDICATORS LED Indicators : Normal Indicators, AVR Indicators, delay time setting and fault indicators Digital or Meter Display : Input and output voltage