My first Bose product.
I personally like this frosted beige color, which is not easy to leave fingerprints. The box is a bit big but not heavy, like a small butter bun. It comes with three pairs of shark fin earphone sets, each in SML code, and the S code is for Asia Designed by the human auricle.
There are ten levels of noise reduction modes that can be adjusted, and the tenth level has a very good noise reduction effect. When used in public transportation, the mid-bass is almost inaudible, and the treble is also significantly weakened, but the sound of the broadcast at the station can still be heard. I can clearly feel the sound of my own breathing.
As the second noise-reducing earplug I started, I am generally satisfied, mainly because it is comfortable to wear and has strong noise reduction! Unfortunately, it is not possible to switch between multiple devices (neither Android nor iOS), but being able to create a quiet little world of your own in the noisy world, enjoying a moment of tranquility on the way to and from get off work is already a kind of spiritual comfort to people.
Alex Lux 
Jason 
