1）MP3 PLAYER+USB FLASH DISK+CARD READER 2）SNR : 》90Db 3） Output power of the earphone : 32Ω Impedance is 5mV 4）Output the frequency range : 20HZ-22KHZ 5） Form of the music : MP3 6）USB2.0 complaint with full speed data transfer 7）USB bus powered capability 8) Support MMC/SD card memory 9) One AAA size 1.5V battery 10) Mp3 format: Mpeg1.0 layer 3 support 11) Five EQ:Normal、Classic、Rock、Bass、Jazz 12) A-B repeat 13) Repeat: single music、All music 14) Volume up/down control 15) Prev/Next song select 16) Size: L62*W62*H13mm 17) Wight (without battery and SD card): 30g 18) Support driver for Windows 98/98se/ME/2000/XP/2003 19) Support MAC OS 8.6, 9.x, 10.x 20) Support Linux kernel 2.4 later 21) Segment LCD display Package Parameter: 1) Giftbox size: 150mmx130mmx50mm 2) Carton size: 540mmx310mmx275mm 3) Packing: 40pcs/ctn 4) N.W.: 8.80kgs/ctn