ElectroTHERAPY TENS Long-Life Pads from OMRON easily snap into electro cords found on the OMRON ElectroTHERAPY TENS Units. Tested in research and development laboratories, the Long Life Pads may be reusable up to 150 times or five months. These pads are 3.5 in. x 4 in.-25% larger than OMRON Standard Pads to cover a wider area of pain. These soft, comfortable pads gently adhere to your skin and are reusable up to 150 times and washable up to 10 times. They are ergonomically shaped to fit around curves. Includes 2 large Long Life Pads with snap connection, holder, instruction manual, quick start guide and pad placement guide.