purchased 2 tvear units, they have poor sound, the clamp on system is like a touture after just a few min. and thoes ear but, you have to be kidding, they hurt, they fall apart after just a few weeks of use. and try to find replacements. i did order some silicone replacements,dont fit the ear canal,and they hurt. i would give anything to return these torture,poor quality units, but cant even get a hold of customer service.