The Fluke Model 8050A Digital Multimeter provides superior performance and measurement capabilities in a low cost, benchtop instrument. These 4 1/2 digit DMMs have the following measurement functions: DC volts, true rms AC volts, DC amps, true rms AC amps, ohms, dBm (with selectable reference impedance's) conductance, and diode test. They also have a relative-reference feature that works with all measurement functions. These units also feature 0.03% basic dc accuracy and true rms from 20 Hz to 50 kHz. They also have overload protection. Rechargeable batteries are available in the model 8050-01 otherwise the 8050A operates on AC line power only.