The extras don't end there. The Phiaton PS 300 headphones are pretty much a traveler's dream. The package includes a nice, hard-shelled case; an airline adapter; and a wallwart power adapter with snap-on attachments for various international outlets. To this you connect a compact USB charging unit, which directly accepts the rechargeable cells. In addition, you get a quarter-inch plug for use with home stereos for when you're not on the go.