Extech 412355A Current and Voltage Calibrator/Meter Precision source for calibrating process devices and measuring DC process signals Oyster case with flip-up display is ideal for handheld or benchtop applications Large 3-1/2 digit LCD display and touch keypad Display readings in mA or as a percent of the 0 to 24mA range or as mV in voltage ranges Provides adjustable 0 to 24mA and 0 to 10V calibration source