Capacity: 4GB Battery type: re-chargeable Li-polimerer battery Battery life: maximum 7 hours Supported music formats: MP3, WMA and ASF Interface: USB 2.0 Dimensions: 78 x 26 x 10 mm Features: folder navigation, voice recording function, 6 equilizer modes, 7 play modes Accessories: stereo ear phone with neck strap and USB cable Technical data LCD Display 96 x 64 pixel Battery type re-chargeable Li-polymer battery Battery run-time Max. 7 hours Record format ACT Record duration (max.) approx. 280 hours having 1GB free memory Supported music formats MP3, WMA and ASF Bit rate MP3/WMA: 8kbps ~ 320kbps Output frequency 20Hz ~ 20kHz SNR >= 90 dB Channel separation >=40dB Frequency response <=3dB (20Hz ~ 20kHz) Line Output Power: headphones L 4mW, R 4mW USB port USB 2.0 (High Speed) Ref.: 3602552 - 4GB White