Audio adapters are used to convert sound signals from one to another. For example, a mono device only giving out a mono audio signal, can still use a stereo headphone, given a mono->stereo adapter is connected. There are many uses for these, and LowCostEarbuds.com can get additional units, not currently listed. Feel free to contact us should you need anything else, not listed.
In addition, we have other audio cables available for your various needs, such as a headphone/earbuds extension cable.