These deluxe, cordless wraps offer TENS therapy and heat therapy to provide drug-free pain relief from sore aching muscles and joints, including arthritis. TENS therapy delivers safe electrical pulses to stimulate the production of endorphins – the body's natural painkillers. Heat therapy enhances circulation to promote healing, relax muscles, reduce stiffness and improve flexibility. Heat and TENS can be used together or separately. Easy-to-use controller lets you customize your treatment with2 heat levels, 20 intensity levels and 8 pulse frequency modes. Rechargeable battery and charging cable are included. Neoprene wraps have adjustable "touch" closures. ABS plastic and electronics. Item can only be shipped to the 48 contiguous United States and cannot ship expedited. TENS Heated Back Wrap (adjusts to fit waists from 28" to 62".