The 2 x 2 inch square is a general-purpose workhorse — well suited to smaller muscle groups, the forearms, calves, neck, and areas where you need precise placement without covering too much surface. Larger pads spread current over bigger muscles; smaller pads target focused points. Because UltraStim pads are reusable, buyers often keep a rotation on hand so pads can rest and re-hydrate between uses, which extends their working life.

Apply pads to clean, dry, oil-free skin, and always store them on the plastic liner in a resealable pouch after use. Keeping the gel side clean and returning pads to a cool spot preserves adhesion far longer than leaving them exposed. When tack fades or the gel dries, it's time to replace — worn pads reduce conductivity and increase the risk of skin irritation.

UltraStim electrodes are compatible with standard snap-lead units across the electrotherapy category. Explore related options in our TENS Units collection and browse additional Electrotherapy supplies to complete your setup.