Head phones & Wireless headphones

Headphones:
Headphone is a very important output device for a computer user in noise place.We man by headphone A receiver, as for a telephone, radio, or stereo, held to the ear.Headphones are a pair of small loudspeakers, or less commonly a single speaker, with a way of holding them close to a user's ears and a means of connecting them to a signal source such as an audio amplifier, radio or CD player. They are also known as earphones, ear buds, stereo phones, headsets or, informally cans. Head-mounted speakers. Headphones have a strap that rests on top of the head, positioning a pair of speakers over both ears. For listening to music or monitoring live performances and audio tracks, both left and right channels are required. When used with the telephone, a microphone is attached, and only one speaker is required
Not only are headphones used by people who want to listen to music without disturbing others, but they have been used for years by critical audiophiles. Headphones can provide an extraordinary listening experience that is far more affordable than room speakers. Quality headphones can sound as good or better than room speakers costing tens of thousands of dollars because it takes a lot less power to drive headphones than it does regular speakers. Most important, headphones create a sealed listening chamber. Although necessary to get the best sound from floor speakers, people rarely configure their hi-fi systems to match their room acoustics. With headphones, there is little or no setup. See ear buds, earphones, virtual headphones and headset.
Wireless headphones:

Wireless Headphone System two wireless headphones with IR transmitter,each headphone features volume control and auto on/off switch