Suffering from joint or muscle pain? Offering 2 times more power than other Omron TENS units, the Omron PM500 Max Power Relief TENS Device is still easy to customize. It is ideal for multiple adult family members who may experience pain in the lower back or recurring knee and shoulder pain. This highly customizable TENS unit has modes to reach most of your pains. Take it to work, use it at home, or while traveling. When you have those hard-to-reach, deep pains that just keep coming back, go Max!