Sony Walkman NWZX2BLK 128 GB Hi-Res Digital Music Player (Black) Memory Size: 128GB Wireless Capabilities: Bluetooth, NFC, Wi-Fi S-Master HX digital amplifier Battery Life: 33 hours (Hi-Res Audio), 60 hours (MP3), Charging Time (Full Charge): 4.5 Hours DSEE HX restores music files