Okay, this thing is pretty neat

The packaging is terribly cheap, but the product isn't too shabby. The glass is thicker and so has some weight to it, compared to my kono 2 cup siphon. I think in the glass world, thinner is harder to produce, and though delicate, considered more quality???
Lower "2" cup lines up with about 300g water, while "3" cup is about 430g.
It comes with a cotton filter, that is supported by a very thin metal plate. My glass rod (the smaller corning one offered on this forum by BoldJava) fits; I lost the little metal handle+beads so didn't use this. Therefore, I used the yama metal filter holder with a paper filter.
The top portion says "TCA-3" below Diguo logo. Interesting.. Hario or Yama compatible maybe?
Instructions say to put the unit to 300-400 mark after filling 70-80% water, and when water reaches the top, put in coffee power, reduce to 200 mark, and let it sit for 45s. Stir, turn off heat. Marks on the unit are 0 and 500. But the manual shows approximate area where these should be.
At the 300-400 imaginary mark took about 5 minutes for water to reach fast, consistent, small bubble phase.
That's about it. Made a cup of coffee, works well, nice equipment!

jano