Electrodes, TENS, Misc. - Intelect IFC interferential : Battery operated portable dual channel IFC stimulation unit. Features include: manual selection for 2 or 4 electrode use; adjustable pulse amplitude, interference frequency and difference frequency parameters; 4 stimulation modes (frequency shifts): continuous, 1/1, 8/8, and 10/10 ramped; and 120V AC line cord adapter.