SONY Walkman W Series headphone integrated 8GB NW-W274S/L Import JPN Brand : Sony Manufacturer's part number: NW-W274S / L Capacity: 8GB ntegrated headphone cables out of the way. About 29g which is not worried at the time of the sports. It is the design which is slim & compact less susceptible to water flow resistance of swimming at the time. The neck band to fit the head, hold it firmly among the violent movement. I can use comfortably in swimming and running in.