Rimba Electro Play pair of adjusable metal clamps. This item fits directly to all 3 Rimba power boxes (7850 / 7880 / 7890) Together in use these clamps are bi-polar. Each individual clamp is uni-polar and a cable with banana plugs is included. Warning: don't put 2 plugs into one clamb because you create a short cut and no shocks will be felt.