Fully programmable: scale, transformer ratio, etc. Measurement of V, A, Hz or ºC. Measurement in true root mean square (TRMS), ac types.Excellent quality/price ratio. Measurement of maximum and minimum values. Optional relay output, depending on the type. The high luminosity 4-digit digital display indicates the voltage, current, frequency or instantaneous temperature, with the maximum and minimum values of medium and low voltage lines.