The apparatus is a rather complex one to be certain, especially for those who are lacking in technological savvy. Cordless headsets work by picking up a transmission from a certain device, hopefully the one which it is intended to read, and duplicating the exact frequency and audio as the original transmission in as close to real time as possible. This can be accomplished in one of two ways, provided interference is not an issue for the cordless headsets in question.

The first frequency used for cordless headsets is the radio transmission, and this is still used today for many models. Radio frequency is adjustable, allowing the user to find a channel which is clear of other users and can offer clear communication. Cordless headsets which use radio frequency for reception are capable of reading signals through walls and at good distances from the transmitter. The negative aspect of the radio frequency technology is that it can often pick up remote communications and interference that are not necessarily conducive to privacy and professionalism.

Infrared technology is also used for modern cordless headsets, and this option tends to be a bit more costly than the aforementioned type. This is typically countered by the convenience of the security that infrared technology provides. When frequency is interrupted or interference occurs, the infrared unit will place the call on hold until connection is reestablished.

The down side of infrared headsets is that they have to remain within a clean and clear line of the transmission in order to maintain a solid connection. When used in call centres and office environments, infrared technology can be extremely hassle free, and are often the cordless headsets of choice due to the security of frequency that they provide.

Not all cordless headsets will work with or link up to all telephone models, so it is imperative that research is done before purchase to ensure compatibility with existing communications systems. Once the choice made toward the headsets that are correctly equipped and priced, the linking and adjustment processes are usually very easy for even the novice user.