ProsI don't know.
ConsI purchased this product for my son in Nov. On Christmas eve, we opened it and as he tried them on a screw holding one of the headphones on broke.

Review:Called Dell for a return, but it was more than 21 days. Manufacturer wont cover it because they say it was physically broke. Buyer beware!

Prosexcellent sound quality
really good microphone
volume control on the cord
really long cord
foldable for travel
Cons5.1 is a little lacking especially when something is supposed to be behind you.

Review:overall a great headset. The sound quality is awesome.

ProsI have to admit, the sound was great on these. As a gamer, I loved them. They were a little warm, but they shut out the outside noise quite nicely, while giving you great surround sound.
Cons1. The microphone went out shortly after the first week of use. I could not get it to work for anything after it failed.
2. The face plate for the volume control fell off in my hand after the second week.
3. It is a real inconvenience to keep pulling out your tower to keep hooking up the headphones to the sound card, then unhooking them to put back the external speakers.
4. After a month, I was putting on and adjusting the headphone for a night of gaming, when the plastic broke holding on the left earphone. In the shock of things, I gripped the right earphone a little tighter, when attepting to catch the left earphone, when the right side snapped off in the same place. The earphones are only attached to the headpiece by wires now. Very, very cheap plastic.

Review:Overall, I'm used to going through earphones regularly. But this product, I will never buy another like it again. Making me wonder if I made a good decision not to buy the 5.1 surround sound soundcard made by Turtle Beach when purchasing these headphones. I know it isn't a good comparison, but if they make the sound card as cheaply as these earphones, I would have been in trouble.

ProsGood sound. Price is equal for the quality of this device.
ConsEar cups are not comfortable. Be assurred within an hour adjusting the ear cups will be necessary. Upon connecting this device use of the computer speakers is void. There is no "switch" or button to revert back to your computer speakers. You must disconnect this device each time you want to use the computer speakers.

ProsAs a gamer this an an excellent set of headphones - the overall sound is clear and crisp, the whof/base is amazing, and the surround sound options is for real. The construction is solid, head wear is very comfortable (for many hours at a time), the mic location is perfect and with black and chrome colors an excellent design appearance.
ConsThe supplier should provide a utility case for storage of the multiple connections that come with the product to reduce the chance of losing hardware connections.