Premium Quality TENS Electrode Pads: improved carbon film, good conductivity, low impedance and uniform current distribution. | Medical Grade Reusable Electrodes: bio-compatible, non-irritating, latex-free and superior environmental adaptability of hydro-gel. | Excellent Self-Adhesive Performance and Easy to Use: good sticky, quick grab, easy to peel and dry-out resisting; the individually bagged for convenience of storage and use. | Universal Compatibility: work with most TENS and EMS in the market with 3.5mm snap connectors; the Small, Medium and Large pads to target different massage locations for a better massage experience.