Check the listing for details. Hidow Electrode Gel Pads for Lower Back Shoulder 3.5 Mm TENS Unit and EMS. Color: Black, Condition: New. Listed at 20.00 USD. Hidow Electrode Gel Pads for Lower Back Shoulder 3.5 Mm TENS Unit and EMS, Universal. Will work with all HiDow devices. Brand New From the Hidow International, Any Order by 2 Pm will ship the Same Day. Dimensions:One 8 ¾” x 3 ½” PadThis pad is excellent for fighting lower back pain! Also, it fits perfectly on larger muscle groups, like arms and legs.Areas of application:lower backbicepsquadsabove the knee (for the most coverage)Buy in bulk and save!When Should You Replace Your Electrodes?When they can no longer stick to the skin.When intensity settings are faulty and muscle contractions are uncomfortable.When the adhesive is filled with non-removable dust, dirt, or hair.Whether you are interested in exploring the world of TENS, EMS, and Microcurrent for your personal pain relief or would like to learn more about HiDow products, our customer service team is ready to answer any questions you may have.