8 Massage roller balls - This shoulder massager comes with 4 Big nodes and 4 small nodes, which provide deep tissue massages on your neck, shoulders, upper back, lower back, waist, Foot, Tights, calves, legs, feet and arms - helping your full body parts To release stress, relieve sore muscles, and help you relax. Adjustable intensity - This neck massager pad has 3 speed strength levels, which allow you to get the right and appropriate amount of pressure to relieve your muscle pain. 2 Massage directions - built in a Bi-directional movement control to mimic the motion of in-person massage experience. This 3D Shiatsu massager will auto-reverse each minute for better distribution of massage effects.