ZJchao GAVR-8A Universal AVR Generator Automatic Voltage Regulator Module 110/220/440 VAC Programmable Input Built-in Hihg Capacity 8A mp Fuse With Under Frequency Protection; Soft Start Voltage Ramping SENSING INPUT Voltage : 90-480V ac max Frequency : 50-60 Hz nominal POWER INPUT Voltage : 95-264V ac max Frequency : 50-60 Hz nominal