Headsets are headphones with a microphone attached. The headsets attach to a telephone or computer to allow for hand-free conversations. Headsets come with either a single earpiece (beneficial for people who still need to be aware of outside noises) or a double earpiece (which blocks out more sound than the single earpiece and allow the listener more ability to focus). Depending on what you are using the headset for, it can come in both on-the-ear and over-the-ear styles.