Shiatsu Back Massager 4 deep kneading massage nodes travel up and down, relaxing your entire back. 3 massage Massage Zones for your choices: Full back, Upper back, Lower back. It warms your back while relaxing muscles across your entire back, lumbar, and shoulders. Intensity Control Flap The detachable intensity control flap allows you to choose a softer or more intense massage. (Note: If you still feel the intensity is too strong after adding the flap, you can place a blanket or towel between you and the massager to get a far softer massage.) Flexible Massage Nodes The massage nodes are adjustable at max. Height of 3mm to fit the body's curves for a more comfortable massage experience.