The Car and Travel Neck Support Pillow is an extremely lightweight and portable model that you can use everywhere from the car to the airport. We consulted sleep experts to provide you with optimal support for your busy life. Shaped perfectly to hug around your neck, this pillow contains 10 magnets and a quarter-pound of natural crushed amethyst and jade gemstones. Your organic body heat stimulates these gemstones to release small levels of far infrared rays and negative ions to relax your mind and body. Using side with magnets will activate your local blood flow where applied and stimulate your brain function.No heat, no controller, just comfort.