... voltage fluctuation: within -15%10%; voltage imbalance: <3%; frequency fluctuation: within 5%.outputVoltageSingle phase,220V & 3 phase,380VOutput ... and current inputAnalog meter output1 terminal, 0/4~20mA or 0~10V available for itDO frequency signal output1 port, ... portRS-485 connector RS485+,RS485-4 bits LED displaysetting frequency, output frequency, output voltage, output current, motor speed, output ...