Press and hold both the red and the rotary buttons for some 3 seconds, until the indicator light flashes alternately in red and green. It is in pairing mode now, thus visible for other devices, for the next 3 minutes. Then, make your phone's bluetooth application search for new devices. After a little while, your car kit should appear on-screen. Select it and make it connect. If a pairing code (or PIN, or passkey) is requested, enter '1234'. If the pairing process is successful, the car kit should sound a beep. By the way, if your car kit's user guide happens to be missing, feel free to download it from this location. You will find many details about settings for your car kit there.

Please, let me know if I can help you any further. Regards, Carlos