Review on Califone 3068AV Switchable Headphones 12 Pack by Joe Glass

I bought two sets of these headphones (24 sets of headphones) for my class and they had problems within the first 6 months. I have 4 sets that have a broken connector in a computer or iPad, one set makes no sound at all and the other is slightly audible from one side even at max volume. Considering we don't use them every day and they didn't even last a year I'm very disappointed that I had to buy more. I have contacted both the company and Revain and have not been offered a refund or replacement. Look for them and don't waste your money on them.