Clinically-proven, natural and effective device for easing pain without requiring the user to take medicine for problem areas such as the back, joints, neck, knees, shoulders, ankles, legs, wrists, and elbows. Ships with 6 reusable pads for precision placement. Align electrodes exactly how you want. – TWO OUTPUTS – Simultaneous dual output designed for two individuals or two different areas on your body. Whether you use 1 or 2 outputs, all pads will deliver the same intensity.