1Applicable Model: Car audio USB switch button and adapter cable are specially designed for RCD510Plus RCD310Plus and Cd radio player. 2Enjoy Car Music: USB switch button is used to connect your music device to your vehicle and allow you to listen to music on the car radio during travel. 3High Transmission Performance: Professional manufacturing, the car audio player switch has high sensitivity connector port for good transmission performance. 4Plug and Play: The car player USB switch button is simple to install, plug and play, and is directly inserted into the auxiliary port on the back of the host. 5Strict Standard: The USB switch button is made of high end Abs materials, standard design, sound quality assurance, improve your music experience.