its a wireless device that fits into your ear that you can use on any blue tooth ready cell phone,that you may answer, speak,listen,and hang up wirelessly
My bluetooth unit is a wireless earpeice with a microphone. So that you can do things and talk on the cell like drive without holding your phone up to your ear. Actually it works well, but I personally think that it is a bit difficult to switch on and off and turn off the link between the phone and the headset.