In addition to the basics, most headsets come with one or more additional features. Before buying you should think about how significant these features are to you. Some headsets come with a carrying case to protect your investment. While this may save you a little money on the purchase, you can readily buy headset cases separately and your flight bag may have a headset compartment as well, so this is more of a bonus than a necessity. Many headsets offer volume controls.
Some models have a single knob on one earcup that controls volume for the unit as a whole.
Others offer separate volume adjustments for each ear. Most major headset manufacturers offer a warranty on their products. The warrantees typically range from one to five years, but a few manufacturers offer lifetime guarantees. Check the terms of a warranty to determine exactly what is and is not covered. So it's important to choose a headset that meets your needs at a price you can afford.