The Cervical & Shoulder Massager has 8 bi-directional moving acupressure nodes for pressure massage that help relieve tension and soothe tired and sore muscles. The massager's integrated control allows you to take control of your massage experience so that you can schedule your favorite massage sessions. It has the function of overheating protection, and it will automatically shut down after 20 minutes of use to ensure safety. The ability to select infrared heat treatment features makes the experience even more relaxed and enjoyable.