Warning:<br />Current must never flow through the heart. Do not use if you have a pacemaker&#44; are pregnant&#44; if you suffer from epilepsy&#44; or on any broken or inflamed skin.<br /><br />Mystim Electrode Adhesive Glue Gel for TENS Units. Electro conductive adhesive&#44; electrode doesn't have to be fixed with adhesive tape. 50g. Not a lubricant.