The 830NB I bought before had a slightly tight headband, which was disappointing, so I bought it...
It's awesome. The sound quality seems to be better, the headband is a bit more spacious, and the design and brown color are really luxurious.
Most importantly, the handle is perfectly visible in the portable case inside the packaging box, which is completely made of paper. I really like the stuck Edifier logo, and the earpads inside the case are made in the same shape, which makes it look very high-end!! !
The app is Edifier ConneX, not Edifier Connect. It's really simple and you can customize the EQ by specifying the frequency band and width ^^.
I highly recommend this product.