Battery: Built-in 3.7V lithium battery.
Operation Voltage: 3.5-4.2V.
S/N Ratio: 90db.
Features:
Music: supporting format includes WMA, DRM WMA, OGG, APE, FLAC, WAV and AAC.
Photo: supporting format includes JPG, BMP, GIF, TIF and PNG; can setting photo as the desktop background.
Video: supporting format includes AVI, WMV, FLV, RM, RMVB, MP4, 3GF, MPEG, VOB