I've found this product. It simply works well. However, one should forget the original software easy.
The original software is cruel. Once lost the connection, the LiveView never reconnects with the phone. Only a restart fixes the problem.
Also the firmware update does not do better.
So play away with the LiveView Sony software, and Open Live View.
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Thus, the small part is going very well. If you lose the connection once, a click is enough on the Live View and the connection is established again. So it must be.
The small monitor pushes all my status lines on my device, information about my battery level and controls my media player. For less than 20 euros a great thing.
Battery life good for 2 days at intensive use.
Only minus is the somewhat weak light Oled screen at Sun difficult to read, but still acceptable.
Anyone looking for a cheap SmartWatch, nothing can go wrong here. Miracles can not be expected, however. It's just a clock that displays the status of the phone. Ideal for example, while driving to take the cell phone in the hand, but simply to see that's not got in a new mail in which one sees on the wrist.