The InvoSpa Shiatsu Back and Neck Pillow Massager features eight deep-kneading nodes that rotate to simulate the hands of a professional shiatsu therapist. The built-in heat function enhances muscle relaxation and improves blood flow to sore areas. A reversible rotation feature prevents muscle fatigue by alternating direction every minute. Versatile enough to target the neck, shoulders, upper back, lower back, calves, and feet.