JAPANESE GEL: 100% Sekisui Japanese gel, which ensures iStim electrodes have the highest quality
LESS IRRITATION:iStim Self Adhering Adhesive Reusable Electrode Passed SGS biocompatibility test, which is more skin-friendly and conductive than other brands on the market.
UNIVERSAL: Compatible with all kinds of TENS, EMS and IF units.Including:TENS 7000
FDA (OTC) approved, no prescription needed / Passed RoHS and LATEX-FREE test