NOTE: Class II - Rx Required * With the powerful rechargeable lithium ion battery this portable device can be used at home at work or on the go. * The InTENSity Select Combo II is the newest standard in portable multifunction electrotherapy offering patients four (4) modalities in one user-friendly ergonomic design - Transcutaneous Electrical Nerve Stimulation (TENS) Neuromuscular Electrical Stimulation (NMES) Interferential Stimulation (IF) and RUSSIAN (RUSS). The wide-ranging capability of the InTENSity Select Combo II provides the most up-to-date treatment technology and waveforms. * Equipped with pre-set body part specific settings as well as a customizable option it intuitively guides the patient step-by-step to ensure the ideal therapeutic treatment throughout the healing cycle. * This powerful device delivers up to 10 000 Hz of IF therapy with sweep frequency capabilities to prevent accommodation while providing maximum treatment benefits. * Simply choose a preset program by body part or customize a program to meet your specific therapy needs. * The RUSSIAN setting provides 2500Hz for a deeper and more comfortable stimulation helping to reduce muscle spasms as well as muscle strengthening. * Contraction and relaxation times are adjustable. *