3 line LED displayMeasures Phase voltage, Line voltage, Average voltage, Phase current, Average current, Frequency, RPMModels with secondary current of 5A and 1APassword protected programming mode through keypad includesRPM : Number of poles programmable from 2 to 16CTPT ratio.Suitable for 5060 Hz electrical systemsAuto scaling of Kilo & Mega LEDsRugged design for industrial use