Computer microphones are used for a variety of purposes, from recording audio, to conferencing and podcasting. Standard computer microphones use a 3.5-inch audio plug and connect to the computer's sound card.
Some newer microphones are wireless and do not need to be plugged in. A user without a traditional sound card can also use a USB microphone, which connects directly to any available USB port. Computer microphones come in a few different styles, but one of the most common is the headset, which combines both the microphone and a pair of headphones. Computer microphones can be purchased at most electronics and computer stores and range in price depending on the specs.