I have been using this earphones for the past few months on my OnePlus 7 pro and I am satisfied with the sound quality and build quality of the earphones so far. The MRP is ₹; 459 and it’s made in China. Since OnePlus doesn’t offer headphones for any of it’s mobiles, I was forced to buy a C-type earphones and OnePlus’ earphones were too costly, so I settled with this. The drive size is 14mm and frequency response is 20Hz - 20kHz. The cable length is 1.2m and it weighs 19grams. It also has in-line mic and call function. Additional ear pieces are also given in the packing. It also comes with 6 months warranty.
The sound quality including bass sound is pretty good for the price they demand. I haven’t faced any issues with this model so far and I don’t think I will in the near future too.