There are 7 steel electrodes built into the leather sheath. When you insert the adapter wire into an extrosex 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 a 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 inches wide and 4 inches long.Get a free universal adapter with purchase. You can use this device with any of our electrosex boxes.