TENS: 'Transcutaneous Electrical Nerve Stimulation'- a safe, non-invasive, drug free method of pain relief used by Physical Therapists and professional Doctors for over decades. iStim A6: With 2 channels, 3 modes, adjustable pulse width from 50-260 and pulse rate from 2-150, sending comfortable impulses through the skin that stimulate the nerve in the treatment area. PREMIUM ELECTRODE: Adopts Japanese Gel which is harmless ingredients and the best fit for even sensitive skin users; Carbon Fiber Wire within the electrodes enhances the strength and provides the perfect conductivity; Super Soft Cloth on the top layer allows the electrode to attach your skin smoothly. APPROVAL: All-Natural, Drug Free and Long-Lasting Pain Relief. 510K approved for OTC use and safety regulations (IEC60601-1, IEC60601-1-2 EMC) certified. INCLUDING: iStim A6 unit x 1; Electrode Pads x 8; Lead Wires x 2; Instruction Manual x 1; Electrode Placement Guide x 1; USB Charger Set x 1