Features:
1) MP3 player + USB flash disk + card reader
2) Output the frequency range: 20Hz-22kHz
3) Form of the music: MP3
4) USB2.0 complaint with full speed data transfer
5) USB bus powered capability
6) Supports 8MB-2GB MMC/SD card memory (push)
7) One AAA size 1.5V battery
8) Five EQ: normal, classic, rock, bass, jazz
9) A-B repeat
10) Repeat: single music, all music
11) Volume up/down control
12) Pre/next song select