The ZoomSwitch Headset Switch allows you to easily switch back and forth on your headset between phone calls on your telephone and VoIP telephony programs such as Skype or MP3 music on your computer. The ZoomSwitch works with either corded or wireless headsets (headset not included). Simple plug-and-play USB set up and RJ9 port for your headset. (Note: If you prefer not to use a headset, you can also plug your phone's handset receiver into the RJ9 port.) Expand the capabilities of your headset today! Listen to webinars, dictate into speech regonition software, etc., and then switch over to a phone call on your telephone on the fly on the same headset. ZMS10-C One year factory warranty.