Yes, they work with any device with a standard 3.5mm stereo jack; a laptop, an iPod and even a cellphone. If you have the smaller 2.5mm stereo jack (like on the MotoQ and some smaller MP3 devices), then you will need a 3.5mm to 2.5mm adapter (which are inexpensive enough. I got mine for $3.00 at Radio Shack). This device comes with the standard 3.5mm stereo to dual 3.5mm mono adapter (also called an "Airline Headphone Seat Adapter") which usually runs US$5 to $6. This enables you to use it on most of the existing airline plug-ins (at least those that have not been switched to a standard 3.5mm stereo port.

Yes, they fit any normal size headphone jack which would work in a computer and the cord is a pretty decent length about 2 or 3 ft long. And it does have its own volume control wheel-thing on the actual headphones.

Yes, it is and new in a bulletproof heavy plastic sealed clamshell display hangar.. bring your EMT sheers. :)

Yes, they come in the original packaging.