The Sony Walkman NWZ-S615F is a digital media player that allows its users to store 500 songs on the 2 GB built-in memory module. This media device offers a battery life up to 33 hours and features such as FM Stereo Tuner, Equalizer Controls. In addition, the model is available in black with the following characteristics: 4.19 cm width, 7.95 cm height, 1.14 cm depth, 51.03 gm weight.