Made of food-grade materials which is safe to human body. The massager is equipped with 4 different shaped massage heads to help the user to relax different body parts. Super Silent when massaging, and features high frequency, high speed. This massager can activate the muscles, stimulate blood flow, greatly reduce muscle recovery time, relieve pain and relax from head to toe. Great to help the user relieve muscle stiffness and soreness, increase blood pressure, improve the overall health of the body’s soft tissues.