BT221i Bluetooth®

I used to wear earbuds, and the issues where my ears got sweaty, and they'd keep falling out were the ones that I thought these Koss earphones would be the answer for, and they are, but the true benefit comes from the fact that I can still hear what's around me while my music plays. If I'm riding a bike, or even just walking outside, now I can hear the cars and traffic around me, whereas before, I couldn't, which is ridiculously unsafe. Do yourself and others a favor and be safe out there. That aside, the sound quality is GREAT. Great treble sensitivity, great bass, great everything, and you'll be aware of your surroundings. I still own over the ear headphones at home that I had prior to these for intense listening sessions, but for literally any activity, these are perfect. Any time you want to be active with music, use these!

Just what i needed ,Thanks!

Put these in my ski helmet. Work great, quality sound for the price.