The partial specs of ATOTO A6

Feature M4 Series A6 Standard A6 Premium A6 HGR
Android version Android 4.4 Android 6.0 Android 6.0 Android 6.0
preset OTA update ×
2s Ultra Quick Boot
Dual Bluetooth 4.0 ×
Info display on RDS station ×
Rename Favored Stations ×
Favored Contacts Option  ×
Bluetooth Tethering internet ×
DAB+ Receiver interface × × ×
Hand Gesture Recognition × × ×
USB 2A fast charge × ×
Media sound available while reversing the car ×
Font Size adjustable ×
More Optimization from M4 Series ×

The early ATOTO A6 Premium series supplied do not come with DAB+ interface, which is only useful for European users and extra DAB+ receiver  is also needed. 
The version with DAB+ interface will be available in later Sept,2017 and will be informed / updated on the website and online store product page.