Sony NW-A17 Walkman Video MP3 Player (64GB) - Black 64GB 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