The Walkman can play back audio files at 24-bit/96 kHz and beyond to hear music closer to the original recording. The gold-plated 99.99% pure OFC (oxygen-free copper) body offers high rigidity and improved sound. A 120-step volume adjustment is available digitally with an analog twist. The Walkman WM1ZM2 provides two headphone jacks. One is a 3.5mm stereo mini jack, and the other is a 4.4mm balanced connection to separate the left and right signals.