Universal Compatibility; Universal Pigtail of electrode pads fits most TENS (Transcutaneous electrical nerve stimulation) units; EMS (Emergency Services) massagers and muscle stimulators. are comfortable to the touch; white non-woven backing with black carbon conductor and premium gel adhesiveReusable tens electrodes; designed for multiple uses when applied and removed with care; excellent conductivity. Self-adhesive tens unit electrodes; conductive, one size fits all pin electrode wire. Safe pads; latex-free; nonirritant to skin; 2.0 mm female connector, fits 2.0 mm male connectorTENS Electrodes, soft and comfortable to usetens unit pads are made of soft non-woven backing, flexible and easily conforms to any contour of your body, super comfortable to use on your back, shoulder, leg, arm, neck, calf, etc. The tens electrodes with black carbon conductor provides super conductivity, no shocks or during electric therapy session.electrode replacement pads. Ten Units Electrodes, safe for use at home. 2x2 electrode , the electrodes have been proven to works perfectly for electrotherapy. Pre-gelled with latex-free gel adhesive, the tens unit electrodes are less irritating to your skin, safe for daily treatment and pain relief.color: WhiteMaterial: Non-wovenWarm Tips:Before Application:1. Clean and dry the application area. Remember you should only apply electrodes to unbroken skin.2. Open and remove electrodes from packaging. Remember to keep the original packaging.3. Peel electrodes from release sheet by lifting the edge of the electrode. Do not pull electrodes up by the wires.4. If electrodes seem dry, or the pads don't stick, add a few drops water to moisten gel and wait a few minutes to allow water to re-hydrate the adhesive gel.5. Place electrodes on treatment area. Apply finger pressure to the edges and press down on entire electrode to assure adequate contact with skin.Removal:1. Gently peel off the electrodes.2. Wipe off electrodes with a non-alcohol wipe or rinse with cold water and wait for it to dry. Sticky side should remain up so it does not adhere to anything.3. Place the sticky side of the electrode on the clear sheet it arrived in and put back in the packaging.4. Store electrodes in a , dry place not exposed to light or any extreme temperature as it may have a permanent adverse effect on the gel. Electrodes can also be kept in the fridge to maximize their lifespan.Package Includes:40PCS Wired Electrode PadsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.