Heatable, deep tissue ball provides effective pain relief anytime;Uses 100 percent natural acupressure and heat to Release tight muscles and joints;Microwave for one minute to receive 60 minutes of soothing heat;Relief for pain/tightness in neck, shoulders, back, leg, hips and feet;Diameter - 3.5 inch;Dr. Oz featured the Acuball on his show calling it an Alternative Health must-have for Back and Neck Pain;Relieves muscle and joint pain naturally using clinically proven accupressure and heat;Empowers users to help themselves saving time and money;Includes acuBall Therapy Booklet