Gain lower back relief increase flexibility and improve your overall energy. Air Flex technology - adjustable intensity inflates for a deep relaxing stretch. Air Flex helps improve flexibility and range of motion. Vibrating waves loosen tight knots and comfort tense muscles. Optional heat soothes sore muscles and helps alleviate pain and stiffness. Hand controls offer 3 levels of heat vibration and 2 auto programs. Small and lightweight design lets you take and use anywhere. Includes AC adapter.