The amazing iLIVING Shiatsu Portable Back/Neck Massager with Heat Therapy uses the latest 3D massage technology, previously available only on massage chairs. This intelligent massage system simulates real-life hand motions, giving users a realistic, pleasurable, and effective full back massage, covering the neck, shoulders, and back. The massaging action is circular, simulating the movements of a massage therapist, to gently relax sore muscles. It comes with an optional heat activation feature, perfect for relieving muscle and joint pain, especially along the spine. This innovative massager uses only 36 watts and plugs into a regular household outlet. It's also lightweight, weighing only 7 lbs., making it a great on-the-go massager that can turn any chair into a massage chair.HeatedVoltage: 100 - 240V / 50HZ / 60HZ