The 412355A from Extech is a current and voltage calibrator and meter. A precision source for calibrating process equipment and measuring DC process signals from 0 to 24 mA or as mV in voltage ranges with a large LCD display that shows readings in mA, as a percentage of the 0 to 24 mA range or as mV in voltage ranges. Other functions include the touchpad and five stored calibration values for quick calibrations.