Before leaving her apartment, Carmen Fernandez, a blind woman living in Madrid, Spain, used to carefully memorize her route—and stick to it—to keep from getting lost. But a new GPS device that Fernandez is testing has freed her from such a rigid routine. Using the gadget's Braille keypad, she punches in her destination, and as she walks, the handheld product calls out directions to her. "Now I can walk home by any route, and I always know where I am," Fernandez says. "I've learned so much about my own neighborhood."