HJS-7S
Electret electrostatic drive unit.
Diaphragm:Electrostatic diaphragm
I will ask the seller for more information about this driver, although he is unlikely to answer, last time they promised to send the information in detail to my email, but they never sent it…
Yeah, I believe that is an MST driver (electret based).
Well, the main thing is that it works as specified. I have not seen the use of this driver in IEM, let’s see. I will measure it in 5 days in my iem build).
Huayunxin has a lot of relatively new drivers that havent been used yet (afaik).
Best try some different tips then? 
The solution is to spend more money I think 
How is compared Hype 4 VS Monarch MK2 or mk3?
Thanks
I am looking forward to hearing your take on the Saber 3.
Just one thing to say before I post sound impressions in a few days
I hope this doesn’t mean “Big Shit”…
An interesting comparison is coming between Saber3 vs SA6 MK2…
There is actually a similarity, but for metal it wins…coming soon 
