I've returned both boxes again after 2 weeks of continuous operation! The automatic stereo link between two boxes but often times did not work, and had to be adjusted manually. Every 3 days were charged the boxes again and yet is fiddly, insert the plug from the charging cable right the first time. This can not go well in the long run ..
The main reason for the return, however, is the following:
Unfortunately, the boxes play a video or movie the sound out of sync from my iPad Air2 from. It seems not to give Bluetooth 4.0, let atpX! Other devices Bluetooth devices with which to perfect from home!
An absolute no-go at these prices !!
Furthermore, the Logitech keyboard for the iPad via Bluetooth did not work correctly if the boxes were turned on.
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Anyway, I'm not a beta tester for Logitech at these prices! Should the standard for Bluetooth change in the pit, you can again think about re-purchase.
MfG