Hisonic MH-602 1GB Sports MP3 Player with SD card Slot Folding USB 2.0 MP3 Player Headphones w/SD Card Slot General Features: Folding headphone behind-the-ear design SD Card slot (supports up to 4 GB) Supports MP3/WMA formats USB 2.0 interface File Format: FAT16, FAT32 MP3 Bit Rate: 8 Kbps - 320 Kbps WMA Bit Rate: 32 bps - 192 Kbps Extra Bass Power: One (1) AAA battery Function Keys: Volume + Volume -