The switch itself is good - but in the supply, there may be problems.

The switch itself is good.
He has 4 Kotakte where you can connect it via a cable screws.
It is also possible, while one turns a line, at the same time to disable another line.
Only the seller from whom I ordered first, Baomain, sitting in China and was not in 5 Wohen able to deliver the switch.
For a refund, he demanded the cancellation of the vote, which I regard as not entirely accurate.
So I did not receive a refund until today.
So I would recommend ordering the switch only when a resident in Germany dealer.
Switch 4 stars, supplier 0 stars.