... .2KW inverter VVVF control, constant,vairable torque mode VD4 series single phase, 220V AC 1.5~2.2KW inverterVD4-21P5Suitable motor: 1.5KW ... be selected.digital output channelProgrammable open-collector output,1 channel; relay output signal ,1 channelDigital panelLED Displayindicate parameters: frequency ,output voltage ...