Earthing patches are similar to the ECG/EKG electrode patches commonly used by doctors for testing purposes. When used for Earthing, you simply apply them to the skin on some part of the body, such as a site of tenderness or pain. One end of the accompanying Earthing cord snaps onto the patch. The other end connects to a grounded wall outlet or ground rod. Each order comes with 50 disposable patches and an Earthing cord. 50 conductive Earthing patches. 2 - 15 feet straight cords. 1 outlet checker. 1 complimentary Earthing book.