Sony Walkman NWZA17SLV 64 GB Hi-Res Digital Music Player (Silver) 64GB1 Hi-Res Walkman Portable Music Player, Supports Hi-Res audio playback of: WAV, AIFF, ALAC, FLAC, and more, Up to 50 hours MP3 playback and 30-hours Hi-Res playback, Stream music wirelessly with Bluetooth & NFC connections Compact, slim design with microSD slot for up to 192GB memory, Easy navigation of songs & folders, 2.25 WVGA LCD anti-reflective display, Drag & drop from iTunes for Mac or Windows S-Master HX digital amplification for unparalleled sound, Advanced Multimedia UX for AV playback and FM radio, Find music to match your mood with SensMe channels, World's smallest and lightest Hi-Res audio portable music player