Koss SP3 Earbuds are a great bargain. They produce very good sound and are made very well. These earbuds have a lifetime warranty, comes with a protective pouch and extra cushion tips. I found that I can wear them for at least 5 hours comfortably. The buds are made to direct the sound into the ear and has a rich deep bass sound. The way they fit in the ear makes them cancel out some of the outside noise. The frequency response is 10-20.000 Hz. Cord length is 4 ft. The in-line mute switch is convienient. I was able to mute in a matter of seconds when I needed to do so. The drawback is the mute was a little sensitive to touch. I wore these earbuds 2 days in a row for 5 hours each day. They stayed in my ears as I moved and I didn't have to adjust them while I worked. I have small ear openings and it is difficult to find a pair of buds reasonably priced that will stay in my ears. I recommend the Koss SP3 Earbuds if you need a pair of earbuds. The price is very reasonable and I was pleased with the performance.
San Antonio, TX