The LT1201 digital TENS Unit is among the latest, and most sophisticated electrotherapy devices for pain relief on the market. This is the first full-line of portable, combination electrotherapy devices to have preset programs by body part, and customizable programs in one device. These devices have the most innovative, up-to-date programs and waveforms available to provide easy to use, noninvasive pain relief. Powered by a rechargeable lithium ion battery, the LT1201 is perfect for at-home or on-the-go therapy.