The sound is good and I hear very little background noise.

I couldn't get it to pair properly for no reason (since I'd paired it before) and once I did, my conversation partner couldn't hear me in terms of volume as well as background noise from the wind on the highway

He said keeps out background noises

Different sizes for the covers, 1 easy to use button, they stay in my ears even when I get sweaty and block out a good chunk of background noise (which is a huge help at the office

They also blocks out background noise of a noisy gym.

Very nice sound quality and great at blocking out background noise.

I was worried b/

The quality is not nearly as good as with the BESIGN SP01 3.5mm Stereo Wired Headphones that I also ordered at the same time.

It also needed to be something useable at the beach where it is often quite windy as well as when I exercise and sweaty.

Works as you expect to facilitate running with headphones in.

it sucked as

Works as it should.

I strong recommend it.