Before firmware upgrade :
1. Make sure of your AK100’s battery level at least over 80%.
2. Make sure of your AK100’s memory size at least over 50 MB.
3. Don't remove the connection between PC & AK100 while transferring hex data.

[Newly added or revised function]
1. Comfortable USD mode
   : USB mode can be changed when the AK120 is connected to PC via USB cable.
     USB DAC <-> Removable disk, Charge battery <-> USB DAC or Removable disk (Settings - USB mode)
2. Folder playback
   : On the top of each folder, 'Play all' key is added, which enables to play all songs and songs
     in sub folders in folder.
3. LineOut
   : Set lower-right button of music playback screen - EQ - LineOut on/off
     Volume fixed at max, and cannot be adjusted.
   * Please do not connect an earphone at LineOut, you can have a serious impact on hearing.
4. Long title displayed on 2 lines in Folder list. (Not in Song/Album/Artist/Genre/MQS list)