1. have two colours:red and black 2.Portable family,office and car 3. relieve lumber discomfort and backaches 4. It can remove those aches of neck, shoulder, back, leg and waist quickly 5. has assistant cure effect upon chronic strain of lumbar muscles 6.alleviate pains caused by menstruation 7. relieve relax fatigued back, lumbar and neck muscles after long time of office work 8.to use at home and office with a reliable secure adaptor 9.with cigarette lighter AC adapter and hand controller