BEFORE PLACING YOUR ORDER CONTACT US SO WE CAN CONFIRM AVAILABILITY AND OFFER YOU A DISCOUNT CODE. YOU MAY DO THIS VIA CHAT OR EMAIL [email protected] SEND US THE PRODUCT NAME AND WE WILL PROVIDE THE DISCOUNT CODE. WE PREFER CHAT TO GET RESPONSE.Those electrode pads connect to universal TENS units, EMS, pulse massagers and muscle stimulators that are equipped with 2mm pin connectors for charge delivery. Each pad is pre-gelled and placed on a flexible white cloth backing which makes it easy to apply and conform to different body part even around joints such as the knees, elbows and shoulders.