4D Deep Tissue Kneading Technology : Equipped with rotating massage nodes that mimic real human-hand movements, providing powerful deep tissue relief for neck, shoulders, back, waist, and legs. SOOTHING HEAT FOR COMFORT: The neck and shoulder massager provides soothing warmth to help you relax. Two adjustable heating levels are available. The dual-zone heat system adheres closely to the skin, providing a warming effect. The dual-zone heat conduction technology system simulates the palm.