I've been using these for a year, but I no longer need them, so I'm selling them! I used them with a protective cover (with a carabiner), so I think there are almost no scratches. Also, I replaced the right S ear tip with a different one from the original set. If you are concerned about this, please refrain from purchasing. Below is the document generated by Mercari! "Mercari Generated Document" The Liberty 4 with noise-canceling function boasts a 28-hour battery life. - Brand: soundcore - Model Name: Liberty 4 - Accessories: Charging case - Color: Gray - Features: Noise canceling - Battery life: 28 hours Thank you for viewing.