Vktech New 2GB Music Player Sports Wireless Water Resistant MP3 Headset 4 Colors (Black) 100% Brand new and high quality Extremely comfortable and secure for the most Students- bicyclist- runners- joggers- walkers etc Driver unit: 13.5mm, dome type (CCAW adopted) Interface: USB mini-B jack, Hi-speed USB (USB2.0 compliant) Length: Approx. 41cm