Delivery was slow for Banggood standards, 35 days from my order date. However the package arrived in perfect shape, was packed well and included all the items as advertised. The directions are in Chinese but it has a picture of how to wire the board. As well as there are youtube videos in case pictures don't explain it for you.
I wired the board to a Lipo 3s 50c battery and I can confirm it makes acceptable welds from setting 6-8 with this battery. Probably with a car battery you can use lower settings. Overall I am pleased with this product as it can make the welds to assemble li-ion/Po batteries to make battery packs. I already made a 2s and 3s li-ion pack. I would recommend this product for a hobby enthusiast.

So far, so nice, works as described. Im using blitzwolf bw-js1 car jump starter as battery. Just soldered EC5 connector to power cables. Welds supplied nickel strip to 18650 on power 6-7. Two strips together on level 2-3.