JSB HF46 3D Full Back Portable Kneading Massager has been designed to help those of you who suffer from frequent back ache. This innovatively designed kneading massager is equipped with 16 rollers that cover the entire back to provide full back massage. It comes with both manual and automatic kneading modes. You may choose a mode as per your convenience to offer complete relaxation to your back. The speed of the massager can be adjusted as per your comfort and requirement.