Arc II Sport open ear headphone is the first of our second-gen Arc open-ear series of earbuds. We've upgraded the open-earbud experience that we helped pioneer and introduced numerous improvements. Arc II Sport open ear earbuds features greater flexibility for improved comfort, 6-axis motion sensor for hands free control, UV-C lighting in the case for sanitizing, IPX5 water and sweat resistance, and improved battery life with an enhanced charging case.