Interferential stimulators provide a current that is essentially a deeper form of TENS. In essence, IFC modulates a high frequency (4000 Hz) carrier waveform with the same signal produced by a TENS unit. The high frequency carrier waveform penetrates the skin more deeply than a regular TENS unit, with less user discomfort for a given level of stimulation. Deep in the tissues, the carrier waveform is cancelled out, resulting in a TENS-like signal deep under the skin.
BodyMedŽ Digital IF 400 Interferential Unit - Dual Channel with 2 Modes, includes AC adapter, 2 lead wires, 1 Pack of 4-1 3/4" Round Cloth Electrodes, 9 Volt battery, carrying case, manual.