GROM VOL94A1 for Select Volvo OEM Stereo AUX-in Interface MP3 Smartphone Auxiliary Adapter Kit Plugs to the extension port of your car stereo. 3.5mm audio jack Plug-and-play operation. No need to splice into factory wiring Works as an AUX Input converter for most MP3 player, smartphone Your stereo should be CD changer capable. The in-dash CD changer will remain working, but external CD changer will be disconnected. ATTENTION: Please see compatible cars in Product Description. For help with installation please watch "GROM Audio" video channel at YouTube.com.