The instruction for zapping with footpads and handholds:

Wrap the handholds and footpads in paper toweling or a thin cotton cloth or sleeve so that no metal is exposed. The best results will be obtained by zapping with the handholds and footpads at the same time. The reason for covering them is to avoid metal ions from entering the body. You must wet the toweling or cotton cloth with water and squeeze out the excess moisture. The damp covering provides the conductivity necessary for therapeutic effectiveness. The covering should be damp but not dripping. If you want to increase the conductivity and power of the zapper you can use salt water instead of unsalted water, but this may be too strong for many people. Do not use distilled water. It does not conduct electricity because there are no minerals in distilled water.

Sprinkle some water on the paper towelling or cotton cloth if it becomes too dry. They should be moist at all times when zapping. You may let them dry out after you have finished zapping so that you can reuse them the next time you zap.

Do not let water drip onto the box or down the wire leads into the box. Your zapper may stop functioning in this case. Always unplug the AC adapter after you have finished zapping.

These footpads can be used with any zapper.

Note: This product is shipped from Canada.