A friend sent me the link to this product as we fly 1S models indoors and I like differential steered twin engine planes powered by brushless motors. So I placed an order for two of them, confident that my Taranis X7S would be able to control it even though it was not very clear to me what protocol (or Protocols) it functioned on.
The sales description is good, but not detailed enough to use the Receiver, in particular how to change "modes"
The receivers arrived quickly (less than two weeks) and I soldered up a power lead and my favourite Brushless motor sockets

First impressions are that this is a very high quality product, but that there are no instructions on its use, and particularly on changing to Mode 2 - the differential brushless mode

Binding was straightforward, although I did not fully understand the description of the protocols ("Flysky i6 i6X Wfly Microzone")
I found a FlySky protocol which worked and was able to test the receiver as delivered.

Servo sockets (Piccoblade 1,25 connectors) - three of them functioned, and we made a note of the channel assignment. I have no idea what the fourth socket is for or does

A friend tested the second receiver and contacted Banggood for instructions, which you sent and he passed to me. The instructions are in Chinese and English, and enabled us to understand how to change Mode and check the selected mode.

Once Mode 2 was selected I found that it drove two brushless motors (1104 type 4500kV) and that the servo sockets had a new assignment in this mode

Summary: Good Quality, performs well and flies my 900mm span Catalina testbed beautifully

Super extra cool fantastic.