Universal Compatibility; Universal pigtail electrode pads fit most TENS (Transcutaneous Electrical Nerve Stimulation) units, EMS (Electrical Muscle Stimulation) massagers, and muscle stimulators. These electrode pads are comfortable to the touch, featuring white non-woven backing with black carbon conductor and premium gel adhesive. Reusable TENS electrodes are designed for multiple uses when applied and removed with care, offering excellent conductivity. Self-adhesive TENS unit electrodes are conductive and compatible with standard 2.0 mm pin connectors. The 2.0 mm female connector fits securely with 2.0 mm male connector. TENS electrodes are soft and comfortable for use, made with soft non-woven backing that is flexible and conforms easily to body contours, ideal for use on the back, shoulder, leg, arm, neck, calf, and other areas. The black carbon conductor ensures reliable conductivity without shocks during therapy sessions. Electrode replacement pads are safe for home use. Pre-gelled with latex-free adhesive, these TENS unit electrodes are non-irritating to the skin and suitable for daily pain relief and electrotherapy treatment. Each pack includes 40 pieces of 2x2 inch wired electrode pads. Warm Tips: Before Application: 1. Clean and dry the application area. Apply only to unbroken skin. 2. Open and remove electrodes from packaging. Keep the original packaging for storage. 3. Peel electrodes from the release liner by lifting the edge. Do not pull by the wires. 4. If electrodes appear dry or lack adhesion, apply a few drops of water to moisten the gel and wait a few minutes to rehydrate. 5. Place electrodes on the treatment area and press firmly around the edges and across the entire surface to ensure good skin contact. Removal: 1. Gently peel off the electrodes. 2. Clean the electrodes with a non-alcohol wipe or rinse with cold water, then allow to air dry. Keep the sticky side facing up to avoid contamination. 3. Return the sticky side to the clear liner and store in the original packaging. 4. Store in a cool, dry place away from direct sunlight and extreme temperatures, as these may affect the gel. Storing in the refrigerator may extend electrode life. Package Includes: 40PCS Wired Electrode Pads Note: The product color may vary slightly due to lighting and display settings. Size measurements may have a tolerance of +/- 1-3 cm.