The NU Dolphin Triathlon is a digital media player that allows its users to store up to 1000 songs on the 4 GB built-in memory module. This media device offers 8 hours battery life and features such as Waterproof, FM Stereo Tuner. In addition, the model is available in black/gray with the following characteristics: 0.8 inches width, 2.6 inches depth, 25 gr weight.