The AKG K240-PP are open-back headphones that deliver professional sound quality. I bought them new about a year ago, but I rarely used them because I bought higher-end headphones shortly after. I've probably used them for a total of about 10 hours. I hope someone can make good use of them. - Model: K240-PP - Brand: AKG - Accessories: Carrying case No pets, non-smoking environment. Thank you for looking.