Brunton SolarRoll Flexible Solar Panel Flexible 4.5-watt solar panel folds up and stores in portable tube Ideal for charging cell phones, MP3 players, and PDAs Tefzel fluoropolymer construction is durable, versatile, and pliable Amorphous thin-film solar cells are effective in low-light conditions Measures 12 x 22 inches and weighs 6.4 ounces; one-year warranty