1) MP3 player + USB flash disk + card reader 2) Output frequency range: 20Hz - 22kHz 3) Four EQ modes: Normal, classic, rock, jazz 4) Repeat: Single music, all music and A-B repeat 5) Form of music: MP3 6) USB2. 0 complaint with full speed data transfer 7) USB bus powered capability 8) Supports MMC / SD card memory 9) One AAA size 1. 5V battery 10) Mp3 format: Mpeg1. 0 layer 3 support 11) Size (L x W x H): 62 x 63 x 13mm 12) Wight (without battery and SD card): 30g 13) Supports driver for Windows 98 / 98se / ME / 2000 / XP / 2003