After repeated requests, the manufacturer has finally nachgelliefert also a bill, so you can buy it in the future but probably. However, the promised German manual is a joke. Even the original English manual bill to be automatically translated from Chinese. The German translation PDF is more funny than helpful.
For Example:
When sc / Sn and S1 / S2 mode, wireless sensors can be set to with MeisterLampe by Speedlite owner.
Zoom button: directly the [Zoom] key, you can zoom rang the lights bracket (Auto, 24, 28, 35, 50, 70, 80, 105 mm).
Please note that the YN568EX Wireless sensor should be faced, Master, and make sure that they are. Within the range of transmission