Sony NWZ-WS613 Waterproof 4GB WS Series Sports MP3 Walkman. Train hard with no interruptions. The NWZ-WS613 Series waterproof Walkman features a lightweight, wrap-around headband that will hold tight whether you’re in the pool or on the track. NFC and Bluetooth connectivity makes listening easy, so you’re free to focus on your workout. Your music is ready to go whenever you are. Simply drag and drop your tunes from your PC or Mac onto your Walkman before you train. Store around 1,000 songs. So buy this Sony NWZ-WS613 Waterproof 4GB WS Series Sports MP3 Walkman® with NFC & Bluetooth and Remote Control for Swimming and Running Now £129.00.