Ultra Ti2 headphones have been optimized for performance, function and durability. Featuring new sound cavity design, open ear design for safety, titanium alloy memory band, high capacity battery & weighing in at only 30 grams. IP67 IEC rated water and sweat resistant design. Headphones that can go with you rain or shine & work or play as hard as you do. No need to worry about dust either with a completely enclosed dust proof ergonomic design. No more battery anxiety with up to 8 hours of battery life so you can enjoy music, phone calls, audiobooks, and podcasts all day long.