The Sony NWZ-A720 is part of Sony's new Walkman series and comes in 3 versions, differing in capacity: NWZ-A729 (16GB), NWZ-A728 (8GB) and NWZ-A726 (4GB). The main benefit to the Walkman series is their included headphones. They're made from adjustable silicone and allows the wearer to fit them comfortably in the ear for long periods of time. The 720 series is similar to Sony's 820 series, but does not have the built-in Bluetooth functionality.
