Headphones poorly built. Several internet postings from owners complain of fragile wires breaking from normal use. Here's the problem: Usual, large guage USB wire, on one side of a volume control dangle from a much-thinner wire on other side of volume control, which lead to one of the two earphones. They are so fragile, that the weight of the heaver wire eventually pull on thinner wire, snapping the ultra thin wires inside. When I disassembled the unit to repair it (I have eight years electronics training), a second problem emerges: The actual connecting wires inside the tiny wire cable (about 1/3 size of the thinnest dental floss) are only painted with tinted paint to insulate them from each other, instead of typical insulation! Eventually, movement (which is what headphone cables do) causes the wires to wear away the ultra-thin colored coating, and short-out. Really cheap, and really stupid design and manufacturing. In my 38 years of electronics experience, this is the cheapest, most failure, or "assured obsolescent design on anything I've seen yet. They sell these Headphones for about $35-60/each. Look up all the complaints from people after owning them only a few months. They all fail the same way. It's an opportunity for a class-action suit from everyone who paid for these and are going to be ripped-off when the bare wires short-out, or break.