The TENS 7000™ 2nd Edition is one of the most popular, and best valued, digital TENS units on the market. This Digital TENS unit is a big improvement over previous models. Proven to be among the most durable and easy-to-use TENS units out there, the upgraded digital processor is more precise and accurate than ever before. This unit is great for users seeking a digital device that is also equipped with physical amplitude knobs. The TENS 7000 is a preferred doctor's choice for effective pain relief.