VarmaxMini Sewing Machine Multifunctional SM-505

Q: Can it do zipper, insulating seam and two polyesters together?

No it can not. It’s a basic stitch machine that doesn’t hold more than a bobble of thread. If you read the specs- they do make it clear that it is a one stitch/basic machine. I’d love my money back as it didn’t even fulfill that promise without 10+ videos online before just giving up.

Q: Can this be use to make wigs with the basic machine?

It kept breaking the thread after a few stitches. Did not like it at all

Q: Could I use this to sew a baby tag blanket, using mink and cotton material?

Though I don’t have an answer to your question, I have successfully sewn folded vinyl and folded swing seat fabric. So I guess if you can slip the fabrics under the needle, it might sew your materials. Good luck!