5 stimulation modes and adjustable pulse width, rate and treatment timer. Built with a digital display which makes it easier to use the device. Comes with two lead conducting wires, four electrode pads, a 9 volt battery and a carry case with an instruction booklet. Commonly used to treat back pain, neck pain, joint pain, arthritis, post-op pain, post-traumatic acute pain, and chronic pain. We also provide replacement pads if you need more.