Screen: White backlight screen ( lattice 96* 96) Record type: MP3 Frequency: 16KHz Record effect: HQ( high) SP( normal) LP( low) , Music format: MP3, WMA Flash memory: 128M---8GB Support System: Windows 98/ SE/ ME/ 2000/ XP/ Vista Battery: 2 pieces of 1.5V AAA battery Dimension: 99.6x32.8x16 MM USB Interface: USB 2.0 high speed Working temperature Minus 20 to 40