BMW 325li has card key usage method: as long as the vehicle matches the card, the card can be posted to the door handle of the driving position to unlock, after entering the car, put the card into the center control wireless charging smart phone tray above, you can start the vehicle, similarly, after getting out of the car, the card is affixed to the door handle of the driving position, and it will be locked when you hear a drop sound. This card key uses NFC communication technology, with the words of white BMW, it appears more atmospheric. BMW is a German automobile brand, part of the BMW Group, it has the i, X, Z, pure number four models and the 1, 2, 3 series, and based on the improvement of the M series