The electro penis leather sheath laces up on the cock and ties off for a nice tight fit. There are 7 steel electrodes built into the leather sheath. When you insert the adapter wire into a Zeus Power Unit, Folsom or Erostek box you will receive an electrical stimulation. Depending on how much power is used the stimulation can be very high or very light. This is an solid accessory to add to your e-stim collection. Bi Polar design makes it easy to use with or without other accessories. The leather sheath measures 4" wide and 4" long.