The Sony Walkman NWZ-B183 is a digital media player with a sleek aluminium finish. It has a 4 GB internal memory that lets you store up to 900 songs. Its built-in battery ensures continuous playback of music for up to 20 hours on a single charge. This red digital media player includes a hi-speed USB 2.0 port and a stereo minijack port. You can tune into your favourite radio stations anytime as this device also features an FM tuner.