Interferential Current Stimulation is used for symptomatic relief and management of chronic and / or as an adjunctive treatment in the management of post-surgical and post- Traumatic acute pain problems. Technical Specifications: No. of Channels: 2, 4 Electrodes Waveform: Symmetrical Square wave (4000 Hz) Adjustable Sweep Frequency 2 Pole / 4 Pole Selections: Sweep Time: 1/1, C, 8/8 & 10/10 Low Battery Indication` Power Source: 9V Battery/Adaptor