Teac DV-W50EK, comments please

A friend of mine asked me if I had some knowledge about Teacs DV-W50EK DVD burner.
I didn´t find much when I did a search, anyone that has some knowledge about this burner?

Well it is an OEM Pioneer DVR-105…

I didn´t know that! Thx dhc!

IS there a way you can reverse the firmware once you have change it to Pioneer? I mean, it is possible to revert to TEAC firmware after you flashed the drive with a Pioneer firmware?