Four-terminal line detection allows for more accurate measurements, separating the current and voltage electrodes, eliminating the need for wiring and probe contact resistance, and four-terminal line detection allows for more accurate measurements, separate current and voltage electrodes eliminate impedance of wiring and probe contact resistance-Kelvin clamp, improve test accuracy-clamp both halves, insulated from each other at hinged joints-straight 4mm banana plug, compatible with many major manufacturers of equipment