Tri-phase will add a whole new dimension to your electro play experience! This cable converts your 4 uni-polar (or 2 bipolar) accessories on 2 separate channels into 2 uni-polar and 1 bipolar accessories on 2 channels combining the sensations of both channels to produce an almost '3 D' experience. They are well marked, black will connect to the bipolar and red to the uni-polar.