There are Great!! Thanks! (^_^), they work perfectly fine :D

I originally bought these as a backup pair for work in case my $100 JBL wireless earbuds ran out of battery, but I actually found myself liking the sound and comfort of this $10 pair more. Yes these are a little 'fuzzier' or lower resolution sounding just because of the limitations of cheaper hardware, but they are much better tuned, avoiding the boomy bass and scooped mids of the JBL. These have surpsingly good super low sub bass extension too. And the soundstage is much wider with better instrument separation, and I'm noticing details in songs I havent heard before. Overall was super surprised that this $10 headphone became my new favorite and will definetely buy from Koss again.

its amazing. would buy again for my sibllings or for my parents. thx so much!

At it's price, it's nice to buy a product from an established, well known company. Koss has been known for decades for producing quality products. The KEB9i earbud with microphone extends this legacy. The buds provide clear audio without static or crackles, while the microphone provides clear voice for cell phone calls. I wouldn't buy anywhere else, for I know the quality I'm receiving from Koss. I recommend the KEB9i so much so that I bought two sets.

For $10, these earbuds with microphone for cell phone usage are excellent; so much so that I immediately ordered a second pair. Incoming sound is clear (no static or crackles) and I've made satisfactory test phone calls to ensure the microphone provides a clear voice.