Don't let back fatigue drive you off the road. Get quick relief with our double-action lumber support cushion. It features a 2-speed massager with HI/LO vibrating action to help relieve tension and un-stress tight muscles. And radiant heat to soothe and relax tired backs—and keep you comfortable on cold winter days. Use together or separately. Cushion attaches with "stay-put" elastic strap. No batteries required. It's powered by your vehicle's 12Vcegarette lighter.