Unfortunately models such as the above are shipped by the box load from the far east and are likely to be badged with the importers/distributors¹ name who, almost invariably, are unlikely to offer any support. However...

If you look here (six rows down and 3 in from the left) you'll see an image of a remote similar to those above that suggest it may be a URC 22B type². With that in mind try these instructions.

I'm not saying they will work, but they are certainly worth a try.

1. It's not uncommon to have the same model of remote be supplied by a number of different importer/distributors; i.e. the same remote, but with different brand names.
2. If you do an image search on URC 22B you'll see they come in a variety of shapes and guises.