GK500 Series Mini V/Hz Control Frequency Inverters are specialized for low power (0.4kW-3.7kW) applications. GK500 Series are compact in volume, simple in operation in V/F control mode. GK500 Frequency Inverters are equipped with multiple frequency command sources, including digital setting, analog input, pulse input, process PID control, simple PLC, multi-step speed, and communication.