Note: Class Ii - Rx Required The Intensity Twin Stim Iv Is The Newest Standard In Portable  Multifunction Electrotherapy Offering Patients Two Modalities In One User-friendly  Ergonomic Design - Transcutaneous Electrical Nerve Stimulation (tens) And Neuromuscular Electrical Stimulation (nmes). Equipped With Pre-set Body Part Specific Settings As Well As A Customizable Option  The Intensity Twin Stim Iv Intuitively Guides The Patient Step-by-step To Ensure The Ideal Therapeutic Treatment Throughout The Healing Cycle. In Addition  Patients Can Modify Treatment Time  Pulse Rate And Duration (width)  Cycling Time  And Contraction/relaxation/ramp Times. The Nmes Setting Sends Gentle Electrical Pulses In A Contraction And Relaxation Rhythm To Help Relieve Muscle Spasms  Re-educate Muscles  And Help Prevent Muscle Atrophy. The Wide-ranging Capability Of The Intensity Twin Stim Iv Is Perfect For Those Patients With Multiple Electrotherapy Needs. With The Powerful Rechargeable Lithium Ion Battery  This Portable Device Can Be Used At Home  At Work Or On The Go.