The InTENSity™ Select Combo II 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. Equipped with a rechargeable lithium ion battery makes this the perfect for at home, or on-the-go, therapy.