I have been using my the other one (shown on the last photo) for long time and working extremely well without loosing. The sound quality since I opened the box in 2014.For detail information and comments on this item you can also check following link. The item "JRC Professional Quality ST-3 Head Phone (New Open Box)" is in sale since Wednesday, December 30, 2020. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Receivers". The seller is "kozukuecho274" and is located in San Jose, California. This item can be shipped to United States.