Technical Parameters for Variable Frequency Drive Inverter 1) Inpute Voltage: 220?5% (We also stock 380?5%, please contact us for item stock) 2) Output Voltage ? 208-240VAC (analogous to Input Voltage)3) Inpute Frequency: 48-63 Hz4) Outpute Frequency: 0-400 Hz5) Inpute Phase: suit for 1 phase input, and also suit for 3 phase input 6) Outpute Phase: 3 phase 7) Warranty: 1 year