1A6 release, 
  ir-mmi-FS2026-0500-0104_V2.6.12.EX49603-1A6.bin
Change notes:
  add Timer function
  
1A7 release,
  ir-mmi-FS2026-0500-0104_V2.6.12.EX51098-1A7.bin
Change notes:
  1. add Erp2 for IR/UPnP/Spotify/DAB modes, and Erp2 time changed to 15 minutes
  2. update SDK to revision 51098, Fix Deutschlandradio issue.
  3. Menu timeout set to 30 seconds.
  4. Keeps counter on screen, unless user press the BACK or MENU key.
  
1A7-2 release(MP version, Global ISU),
  ir-mmi-FS2026-0500-0104_V2.6.12.EX51098-1A7-2.bin
Change notes:
  1. fix bug, when in lastlisten menu, rotary encoder does not work. 
  2. fix bug, FM/Aux-in modes will enter standby mode after 15 Minutes, even if Aux-In has audio input.
  3. fix bug, when ISU upgrade backlight does not light up.

1A8 release, 
  ir-mmi-FS2026-0500-0104_V2.6.16.EX52001-1A8.bin
Change notes:
  update to IR2.6.16 SDK, revision 52001, support dedicated Spotify mode.
  
1A9 release, 
  ir-mmi-FS2026-0500-0104_V2.6.17.EX53300-1A9.bin
Change notes:
  update to IR2.6.17-3 SDK,revision 53300.

1A10 release,
  ir-mmi-FS2026-0500-0104_V2.6.17.EX53966-1A10.bin
Change notes:
  update to IR2.6.17-4 SDK, revision 53966.

1B1 release,
1. change SPOTIFY_MODEL_NAME from "ir902s" to "IR320". 
2. update to revision 53966, VERSION := 2.6.17.EX53966.
3. SELECT_AS_PLAY_PAUSE when in spotify mode.

1B2 release,
fix the bug, Egg-Clock can not set larger than 54 minutes and 37 seconds.

1B3 release, 
update to 2.6.17-6 SDK, revision 55921.

1B4 release,
1. German OSD string "Auxiliary Inut" to "Auxiliary Input".
2. add 90 and 120 minutes sleep time.

1B5 release,
  increase to 30 presets.