Its useful for all kinds of drivers and massage helpfully for different parts of the bodies in physical treatment. Stimulate the reactive area of human beings organs, Enhance the blood circle, improve the immunity functions, relax the muscle pairs. Take away the driving tiresome, make the driver concentrate on driving so that keep the safety always be with you. VN :DC 12V;PN:15W Size:180?90?100mm ;weight:0.6kg Rated working hours:30mins