The iPhone Bluetooth Headset, available separately, features autopairing and simple operation. You must pair the headset with iPhone before you can use it.

Pair the headset with iPhone:
Connect the iPhone and the headset to the iPhone Bluetooth Travel Cable, then connect the cable to your computer.

iPhone and the headset pair automatically when they’re connected to the travel cable. The first time you connect the headset, let it charge for about an hour until the status light on the headset turns green. When iPhone and the headset are connected to your computer, iPhone displays the headset battery level.

You must connect the headset with iPhone before you can answer or make calls.

Connect the headset with iPhone:
Press the button on the headset.

Make or answer a call:

  1. Place the headset in either ear with the microphone pointed towards your mouth.

    iPhone Bluetooth Headset

  2. Make a call on iPhone, or press the button on the headset to answer an incoming call.

    iPhone Bluetooth Headset

End a call:
Press the headset button.
Adjust the volume:
Use the iPhone volume buttons.
Decline an incoming call:
Press button for about one second, until you hear a beep.
Switch to an incoming or on-hold call and put the current call on hold:
Press button.
Switch to incoming or on-hold call and end current call:
Press button for about one second, until you hear a beep.
Check whether the headset is turned on:
Press button. If the headset is on, status light blinks green and headset beeps.
Turn the headset on:
Press and hold button for about three seconds, until you see the status light blink green or hear four rising tones.
Turn the headset off:
Press and hold button for about four seconds, until you see the status light blink amber or hear four falling tones.

For more information, see the iPhone Bluetooth Headset User Guide.

http://www.apple.com/iphone/tips/