The method of the cable using:Please insert the black plug into the corresponding interface of RD4, RD43, and RD45, and insert the yellow plug into the 12-pin screen interface.The range of the cable using:You need to increase a new screen when a Type A screen or a Type C screen has already exist in your car.Instructions:After this cable is connected, what the new screen display is the same with the original screen display. And the new screen can display what the original screen cannot,such as RD45 song information.If you do not understand, please contact me in the station letter.Cable length: 1 meter
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