Specifications:   Operating Modes:    Source: Output 0-24mA current for loads up to 350 ohms Output 0-10V (412355 only)    Measure: 0-50mA current signal 0-19.99V (412355 only)    Power/Measure: Provides power (12VDC) to loop & measures current(412300 only) Input/Output Ranges and Display: Resolution       -25.0 to 125.0% (representing 0 to 24mA)       0.1%       0 to 19.99 mA       0.01 mA       0 to 24.0 mA       0.1 mA       0 to 1999 mV       1 mV       0 to 10.00 V       10 mV Accuracy: 0.025% ±1 digit Accuracy: 0.025% ±1 digit Power: 9 volt battery or optional AC adaptor