Android Tool with instructions for doing a clean wipe of the DX220 with .img firmware. The USB/DAC from our download site on www.ibasso.com also has to be installed on your computer (Windows based). .img firmware for use with the Android Tool for DX220. http://www.ibasso.com/uploadfiles/download/DX220_20190410_1.08.050.zip Android Tool: http://www.ibasso.com/uploadfiles/download/AndroidTool.zip AMP9 OUTPUT IMPEDANCE 0.3 OHMS. For AMP9 you must update to at least to the latest firmware of June 16, 2019. DX220. A screen by Sharp. High resolution to accompany your music journey. Fine tuned, ready to play, ready to destress your day. Link for the Manual Download of the DX220: Right Here! Change Log for May 20, 2019 Firmware: Android OS: 1. Rectified the bug that some quick chargers will not function correctly with the DX220 when the DX220 is powered off. 2. Artist view is now changed to Artist/Album/Song structure. 3. Artist view now uses the Album Artist tag instead of Artist tag. 4. Rectified the bug that when the playback is paused and the previous button is pressed, the track info was not refreshed. 5. Rectified the bug that when playing video, the sound is incorrect. Mango OS: 1. Improved the shuffle mode. It really is About the Music!