Rimba Electro Play plastic electra body clamps with cable included. This items fits directly to all 3 Rimba power boxes #7850, #7880 and #7890 Each channel at the powerbox is bi-polar, like the 2,5 mm jack plug but the black clamps are each uni-polar. Chock can only be fely if bots poles are connected to the skin. Clamps are not painfull and perfect to use on labia and scrotum.